Academic article

• Tilde Martinsen; Caroline Jensen; Jan Gunnar Hatlebakk et al. (2026). Gastrointestinal symptoms, faecal short-chain fatty acids and dietary intake in older adults: the Hordaland Health Study 3. (external link)
• Mina Susanne Weedon-Fekjær; Hege K. Pihlstrøm; Harald Weedon-Fekjær et al. (2025). Gastrointestinal symptoms in adults with Fabry disease and their associations with physical and mental health. (external link)
• Lars Lundell; Stephen E. A. Attwood; Christian Ell et al. (2008). Comparing laparoscopic antireflux surgery with esomeprazole in the management of patients with chronic gastro-oesophageal reflux disease: a 3-year interim analysis of the LOTUS trial. (external link)
• Tarek Mazzawi; Trygve Hausken; Per Førde Refsnes et al. (2022). The Effect of Anaerobically Cultivated Human Intestinal Microbiota Compared to Fecal Microbiota Transplantation on Gut Microbiota Profile and Symptoms of Irritable Bowel Syndrome, a Double-Blind Placebo-Controlled Study. (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk; Odd Helge Gilja (2016). Abnormalities in endocrine and immune cells are correlated in dextran‑sulfate‑sodium‑induced colitis in rats. (external link)
• Christian Jonasson; Bjørn Moum; Christen Bang et al. (2012). Randomised clinical trial: a comparison between a GerdQ-based algorithm and an endoscopy-based approach for the diagnosis and initial treatment of GERD. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2014). Abnormal rectal endocrine cells in patients with irritable bowel syndrome. (external link)
• Jan Gunnar Hatlebakk; Arnold Berstad (1994). Prokinetica ved reflukssykdom. Virkningsmekanismer og klinisk effekt. (external link)
• Jan Gunnar Hatlebakk (1994). Konferanserapport Digestive diseases WEEK 1994. (external link)
• Håvard Hatle; Boris Erwied; Inge Lode et al. (2014). En gravid kvinne med oppkast og pustebesvær. (external link)
• Magdy El-Salhy; Hege Østgaard; Doris Irene Gundersen et al. (2012). The role of diet in the pathogenesis and management of irritable bowel syndrome (Review). (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk; Odd Helge Gilja et al. (2019). Efficacy of faecal microbiota transplantation for patients with irritable bowel syndrome in a randomised, double-blind, placebo-controlled study. (external link)
• Birgitte Berentsen Jacobsen; Camilla Thuen; Eline Margrete Randulff Hillestad et al. (2025). The Effects of Digital eHealth Versus Onsite 2-Day Group-Based Education in 255 Patients With Irritable Bowel Syndrome: Cohort Study. (external link)
• Jan Gunnar Hatlebakk; Luciana Camacho-Lobato; Philip O. Katz et al. (2000). Proton pump inhibitors: better before breakfast than without breakfast. (external link)
• Philip O. Katz; Jan Gunnar Hatlebakk; Donald O. Castell (2000). Gastric acidity and acid breakthrough on omeprazole 20mg b.i.d. or lansoprazole 30mg b.i.d. (external link)
• Magdhy El-Salhy; Jørgen Valeur; Ingeborg Brønstad et al. (2025). Possible Role of Butyric Acid in Long-Term Symptom Relief in Irritable Bowel Syndrome Patients Following Fecal Microbiota Transplantation. (external link)
• Jan Gunnar Hatlebakk; A. Berstad (1996). Gastro-oesophageal reflux during 3 months of therapy with ranitidine in reflux oesophagitis. (external link)
• Jan Gunnar Hatlebakk; A. Berstad (1996). Pharmacokinetic optimisation in the treatment of gastrooesophageal reflux disease. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2012). High densities of serotonin and peptide YY cells in the colon of patients with lymphocytic colitis. (external link)
• Nasser M. Abudujain; Mohammed A. Batais; Mohamad Ayham Muqresh et al. (2024). Translation, cultural adaptation, and evaluation of the psychometric properties of the Arabic Gastroesophageal Reflux Disease Questionnaire (Ar-GerdQ). (external link)
• Roberto Fiocca; Luca Mastracci; Stephen E. A. Attwood et al. (2012). Gastric exocrine and endocrine cell morphology under prolonged acid inhibition therapy: results of a 5-year follow-up in the LOTUS trial. (external link)
• Magdy El-Salhy; Ingvild Haukaas Wendelbo; Doris Irene Gundersen et al. (2013). Colonoscopy with mucosal biopsies in young rats: A model for experimental gastroenterology. (external link)
• Lars R. Lundell; Pekka Miettinen; Helge E. Myrvold et al. (2000). Long-term management of gastro-oesophageal reflux disease with omeprazole or open anti-reflux surgery: results of a prospective, randomized clinical trial. (external link)
• Ludger Dorlöchter; Espen Kolsrud; Edda Jonina Olafsdottir et al. (2000). Oesophagusstriktur som komplikasjon til gastrøsofageal refluks hos barn. (external link)
• Jan Gunnar Hatlebakk; A. Berstad (1996). Lansoprazole 15 and 30 mg daily in maintenanxe therapy of reflux oesophagitis. (external link)
• Arnold Berstad; Ketil Berstad; Ingvard Wilhelmsen et al. (1995). Spiramycin in triple therapy of Helicobacter pylori-associated peptic ulcer disease. An open pilot study with 12-month follow-up. (external link)
• Stephen E. A. Attwood; Lars Lundell; Christian Ell et al. (2008). Standardization of surgical technique in antireflux surgery: The LOTUS trial experience. (external link)
• Lars Lundell; Jan G Hatlebakk; Jean-Paul Galmiche et al. (2015). Long-term effect on symptoms and quality of life of maintenance therapy with esomeprazole 20 mg daily: A post hoc analysis of the LOTUS trial. (external link)
• Odd Helge Gilja; Jan Gunnar Hatlebakk; Svein Ødegaard et al. (2007). Advanced imaging and visualization in gastrointestinal disorders. (external link)
• Birgitte-Elise G Emken; Lars R Lundell; Lene Wallin et al. (2017). Effects of omeprazole or anti-reflux surgery on lower oesophageal sphincter characteristics and oesophageal acid exposure over 10 years. (external link)
• Tarek Mazzawi; Trygve Hausken; Johannes Espolin Roksund Hov et al. (2019). Clinical response to fecal microbiota transplantation in patients with diarrhea-predominant irritable bowel syndrome is associated with normalization of fecal microbiota composition and short-chain fatty acid levels. (external link)
• Roberto Fiocca; Luca Mastracci; Stephen E. A. Attwood et al. (2010). Long-Term Outcome of Microscopic Esophagitis in Chronic GERD Patients Treated With Esomeprazole or Laparoscopic Antireflux Surgery in the LOTUS Trial. (external link)
• Hanna Fjeldheim Dale; Jan Gunnar Hatlebakk; Nils Hovdenak et al. (2018). The effect of a controlled gluten challenge in a group of patients with suspected non-coeliac gluten sensitivity: A randomized, double-blind placebo-controlled challenge. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Jan Gunnar Hatlebakk (2009). Mucosal blood flow measurements using laser Doppler perfusion monitoring. (external link)
• Jan Gunnar Hatlebakk; M.V. Hatlebakk (2004). Diagnostic approach to suspected irritable bowel syndrome. (external link)
• Jan Gunnar Hatlebakk (2004). Behandling av gastroøsofageal refluks hos gravide. (external link)
• Magdy El-Salhy; Jan G Hatlebakk; Odd Helge Gilja et al. (2015). Densities of rectal peptide YY and somatostatin cells as biomarkers for the diagnosis of irritable bowel syndrome. (external link)
• Jan Gunnar Hatlebakk; Svein Ødegaard (1998). Endoscopic ultrasound - a new look at achalasia?. (external link)
• A. Berstad; K. Berstad; Jan Gunnar Hatlebakk et al. (1994). Ti dagers trippelkur for Helicobacter pylori-infeksjon og magesår: Status fire uker og ett år etter. (external link)
• Magdy El-Salhy; Jørgen Valeur; Trygve Hausken et al. (2020). Changes in fecal short-chain fatty acids following fecal microbiota transplantation in patients with irritable bowel syndrome. (external link)
• Jan Gunnar Hatlebakk (2010). Endoscopy in gastro-oesophageal reflux disease. (external link)
• Magdy El-Salhy; Trygve Hausken; Jan Gunnar Hatlebakk (2020). Density of Musashi‑1‑positive stem cells in the stomach of patients with irritable bowel syndrome. (external link)
• Ingvard Wilhelmsen; Jan Gunnar Hatlebakk; Snorri Olafsson et al. (1999). On demand therapy of reflux oesophagitis - a prospective study of symptoms, patient satisfaction and quality of life. (external link)
• Jens Brøndum Frøkjær; Andra Sorina Boldea; Dag Arne Lihaug Hoff et al. (2014). Do patients with functional chest pain have neuroplastic reorganization of the pain matrix? A diffusion tensor imaging study. (external link)
• Magdy El-Salhy; Kazuo Umezawa; Odd Helge Gilja et al. (2014). Amelioration of Severe TNBS Induced Colitis by Novel AP-1 and NF-κB Inhibitors in Rats. (external link)
• Mattis Bekkelund; Dag André Sangnes; Eirik Wigtil Søfteland et al. (2021). Gastroparesis symptoms associated with intestinal hypomotility: An explorative study using wireless motility capsule. (external link)
• Christian Jonasson; Jan G Hatlebakk; Lars R Lundell et al. (2013). Association between adherence to concomitant proton pump inhibitor therapy in current NSAID users and upper gastrointestinal complications. (external link)
• Elin-johanne Katle; Jan Gunnar Hatlebakk; Tore Grimstad et al. (2017). Gastro-oesophageal reflux in patients with chronic rhino-sinusitis investigated with multichannel impedance - pH monitoring. (external link)
• Luca Mastracci; Roberto Fiocca; C Engström et al. (2017). The dynamics of the oesophageal squamous epithelium `normalisation´ process in patients with gastro-oesophageal reflux disease treated with long-term acid suppression or anti-reflux surgery. (external link)
• Emmanuel Coron; Jan Gunnar Hatlebakk; Jean-Paul Galmiche (2007). Medical therapy of gastroesophageal reflux disease. (external link)
• A. Berstad; K. Berstad; Jan Gunnar Hatlebakk et al. (1994). Ti dagers trippelkur for Helicobacter pylori-infeksjon og magesår: Status fire uker og ett år etter. (external link)
• Magdy El-Salhy; Christina Casén; Jørgen Valeur et al. (2021). Responses to faecal microbiota transplantation in female and male patients with irritable bowel syndrome. (external link)
• S. Tefera; Arnold Berstad; J. C. Bang et al. (1996). Bismuth-based combination therapy for Heliobacter pylori-associated peptic ulcer disease (metronidazole for eradication, ranitidine for pain). (external link)
• Jan Gunnar Hatlebakk; Donald O. Castell (1998). Dysphagia in the elderly: Diagnostic approach and clinical management. (external link)
• Lars Lundell; J Dalenbäck; Jan Gunnar Hatlebakk et al. (1998). Outcome of open anti-reflux surgery as assessed in a Nordic multicentre, prospective clinical trial. (external link)
• Jan Gunnar Hatlebakk; Donald O. Castell (1998). Obesity and gastroesophageal reflux. (external link)
• Magdy El-Salhy; Renate Winkel; Christina Casén et al. (2022). Efficacy of fecal microbiota transplantation for patients with irritable bowel syndrome at 3 years after transplantation. (external link)
• Arnold Berstad; Jan Gunnar Hatlebakk; K-E Giercksky (1998). Barretts øsofagus. Et økende problem. (external link)
• Rolf Carlsson; R Watts; Stuart Riley et al. (1998). Gastro-oesophageal reflux disease in primary care - an international study of different treatment strategies with omeprazole. (external link)
• Magdy El-Salhy; Tarek Mazzawi; Trygve Hausken et al. (2017). Interaction between diet and gastrointestinal endocrine cells. (external link)
• Eline Lundekvam Storlid; Trygve Hausken; Gülen Arslan Lied et al. (2017). Gastric accommodation in healthy subjects studied by ultrasound, manometry, and impedancemetry. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2012). Chromogranin A cell density as a diagnostic marker for lymphocytic colitis. (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk; Trygve Hausken (2019). Diet in Irritable Bowel Syndrome (IBS): Interaction with Gut Microbiota and Gut Hormones. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2013). Low‑grade inflammation in the rectum of patients with sporadic irritable bowel syndrome. (external link)
• Hanna Fjeldheim Dale; Caroline Jensen; Trygve Hausken et al. (2019). Effects of a Cod Protein Hydrolysate Supplement on Symptoms, Gut Integrity Markers and Fecal Fermentation in Patients with Irritable Bowel Syndrome. (external link)
• Khanh Do-Cong Pham; Roald Flesland Havre; Thomas Langø et al. (2018). Navigated retrograde endoscopic myotomy (REM) for the treatment of therapy-resistant achalasia. (external link)
• Magdy El-Salhy; Odd Helge Gilja; Jan G Hatlebakk et al. (2014). Stomach antral endocrine cells in patients with irritable bowel syndrome. (external link)
• Magdy El-Salhy; Kazuo Umezawa; Jan Gunnar Hatlebakk et al. (2017). Abnormal differentiation of stem cells into enteroendocrine cells in rats with DSS-induced colitis. (external link)
• Christian Jonasson; Bjørn Moum; Christen Joachim Bang et al. (2012). Randomised clinical trial: a comparison between a GerdQ‐based algorithm and an endoscopy‐based approach for the diagnosis and initial treatment of GERD. (external link)
• Magdy El-Salhy; Odd Helge Gilja; Doris Irene Gundersen et al. (2014). Endocrine cells in the ileum of patients with irritable bowel syndrome. (external link)
• Caroline Jensen; Hanna Fjeldheim Dale; Trygve Hausken et al. (2019). Supplementation with cod protein hydrolysate in older adults: A dose range cross-over study. (external link)
• Magdy El-Salhy; Tanisa Patcharatrakul; Jan Gunnar Hatlebakk et al. (2017). Chromogranin A cell density in the large intestine of Asian and European patients with irritable bowel syndrome. (external link)
• P. Fockens; M.J. Bruno; A. Gabbrielli et al. (2004). Endoscopic augmentation of the lower esophageal sphincter for the treatment of gastroesophageal reflux disease: Multicenter study of the gatekeeper reflux repair system. (external link)
• John Dent; Peter J. Kahrilas; Jan Gunnar Hatlebakk et al. (2008). Center for drug evaluation and research. Clinical white paper for the CDER-PHRMA-AASLD conference on drug-induced liver disease: A national and global problem. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2010). Sensation evoked by esophageal distension in functional chest pain patients depends on mechanical stress rather than on ischemia. (external link)
• Thierry Piche; Jan Gunnar Hatlebakk (2006). Dysphagia in the course of gastro-oesophageal reflux before surgery. (external link)
• Magdy El-Salhy; Tanisa Patcharatrakul; Jan Gunnar Hatlebakk et al. (2017). Enteroendocrine, Musashi 1 and neurogenin 3 cells in the large intestine of Thai and Norwegian patients with irritable bowel syndrome. (external link)
• Caroline Jensen; Hanna Fjeldheim Dale; Trygve Hausken et al. (2020). The effect of supplementation with low doses of a cod protein hydrolysate on satiety hormones and inflammatory biomarkers in adults with metabolic syndrome: A randomized, double-blind study. (external link)
• Magdhy El-Salhy; Odd Helge Gilja; Jan Gunnar Hatlebakk (2023). Increasing the transplant dose and repeating faecal microbiota transplantation results in the responses of male patients with IBS reaching those of females. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Dag André Sangnes et al. (2018). The kinetics of gut microbial community composition in patients with irritable bowel syndrome following fecal microbiota transplantation. (external link)
• Magdy El-Salhy; Inge Seim; Lisa Chopin et al. (2012). Irritable bowel syndrome: the role of gut neuroendocrine peptides. (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk; Odd Helge Gilja et al. (2019). Efficacy of faecal microbiota transplantation for patients with irritable bowel syndrome in a randomised, double-blind, placebo-controlled study. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2010). Mechanosensation and Mucosal Blood Perfusion in the Esophagus of Healthy Volunteers Studied with a Multimodal Device Incorporating Laser Doppler Flowmetry and Endosonography. (external link)
• Solomon Tefera; Odd Helge Gilja; Jan Gunnar Hatlebakk et al. (1999). Intragastric distribution and volume estimation of a liquid meal in patients with gastro-oesophageal reflux disease assessed by three-dimensional ultrasonography. (external link)
• Snorri Olafsson; Arnold Berstad; CJ Bang et al. (1999). Spiromycin is comparable to oxytetracycline in eradicating H. pylori when given with ranititine bismuth citrate and metronidazole. (external link)
• Javier P. Gisbert; Alun Cooper; Dimitrios Karagiannis et al. (2009). Impact of gastroesophageal reflux disease on work absenteeism, presenteeism and productivity in daily life: a European observational study. (external link)
• Javier P. Gisbert; Alun Cooper; Dimitrios Karagiannis et al. (2009). Impact of gastroesophageal reflux disease on patients' daily lives: a European observational study in the primary care setting. (external link)
• Magdy El-Salhy; Anja Bråthen Kristoffersen; Jørgen Valeur et al. (2021). Long-term effects of fecal microbiota transplantation (FMT) in patients with irritable bowel syndrome. (external link)
• Christian Jonasson; Ingunn Fride Tvete; Jan G Hatlebakk (2013). Patterns of proton pump inhibitor utilization in gastroesophageal reflux disease and the effect of restrictions on reimbursement: a nationwide prescription database study. (external link)
• Lars Lundell; Pekka Miettinen; Helge Elliot Myrvold et al. (2009). Comparison of outcomes twelve years after antireflux surgery or omeprazole maintenance therapy for reflux esophagitis. (external link)
• Magdy El-Salhy; Odd Helge Gilja; Jan Gunnar Hatlebakk (2019). Overlapping of irritable bowel syndrome with erosive esophagitis and the performance of Rome criteria in diagnosing IBS in a clinical setting. (external link)
• Khanh Do-Cong Pham; Asgaut Viste; Aly Dicko et al. (2015). Peroral endoscopic pyloromyotomy for primary pyloric stenosis. (external link)
• Guy E Boeckxstaens; Hanneke Beaumont; Jan G Hatlebakk et al. (2011). A novel reflux inhibitor lesogaberan (AZD3355) as add-on treatment in patients with GORD with persistent reflux symptoms despite proton pump inhibitor therapy: a randomised placebo-controlled trial. (external link)
• Solomon Tefera; Jan Gunnar Hatlebakk; Arnold Berstad (1999). Effect of Helicobacter pylori eradication on gastro-oesophageal reflux. (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk (2024). Factors Underlying the Difference in Response to Fecal Microbiota Transplantation Between IBS Patients with Severe and Moderate Symptoms. (external link)
• Anne Gerd Granås; Rønnaug Larsen; Kjell Haug et al. (2005). Apotekpersonalets egenvurdering av kompetanse og faglig selvtillit. (external link)
• Tarek Mazzawi; Emily Bartsch; Sara Benammi et al. (2019). Gastric emptying of low- and high-caloric liquid meals measured using ultrasonography in healthy volunteers. (external link)
• YM Fouad; Phil O Katz; Jan Gunnar Hatlebakk et al. (1999). Ineffective esophageal motility: the most common motility abnormality in patients with GERD-associated respiratory symptoms. (external link)
• L Lundell; P Miettinen; B Liedman et al. (1999). Lack of effect of acid suppression on gastric atrophy. Nordic GERD Study Group. (external link)
• M Vela; L Lobato-Camacho; Jan Gunnar Hatlebakk et al. (1999). Effect of Omeprazole (PPI) on Ratio of Acid to Nonacid Gastroesophageal Reflux. Studies Using Simultaneous Intraesophageal Impedance and pH Measurement. (external link)
• Jan Gunnar Hatlebakk; A Hyggen; P Madsen et al. (1999). Therapy for heartburn in primary care patients - an 8 weeks randomized double-blind study of omeprazole versus cisapride and placebo. (external link)
• Solomon Tefera; Jan Gunnar Hatlebakk; Arnold Berstad (1999). The effect of eradication of H.pylori on gastro-oesophageal reflux. (external link)
• Jan Gunnar Hatlebakk; JA Castell; Vera Paoletti et al. (1998). Dilatation therapy for dysphagia in patients with upper esophageal sphincter dysfunction - manometric and symptomatic response. (external link)
• Hanna Fjeldheim Dale; Caroline Jensen; Trygve Hausken et al. (2018). Effect of a cod protein hydrolysate on postprandial glucose metabolism in healthy subjects: A double-blind cross-over trial. (external link)
• Magdy El-Salhy; Jan G Hatlebakk; Trygve Hausken (2015). Reduction in duodenal endocrine cells in irritable bowel syndrome is associated with stem cell abnormalities. (external link)
• Dag Arne Lihaug Hoff; Anne Lund Krarup; Dina Lelic et al. (2013). Central response to painful electrical esophageal stimulation in well-defined patients suffering from functional chest pain. (external link)
• Jan Gunnar Hatlebakk; Phil O Katz; Donald O Castell (1999). Medical therapy: Management of the refractory patient. (external link)
• Emmanuel Coron; Jan Gunnar Hatlebakk; J.P. Galmiche (2006). Novel developments in non-erosive and erosive gastroesophageal reflux disease. (external link)
• Kjell K Øvrebø; Jan Gunnar Hatlebakk; Asgaut Viste et al. (1998). Gastroesophageal reflux in morbid obese patients treated with gastric banding or vertical banded gastroplasty. (external link)
• Stephen E. Attwood; Christian Ell; Jean-Paul Galmiche et al. (2015). Long-term safety of proton pump inhibitor therapy assessed under controlled, randomised clinical trial conditions: Data from the SOPRAN and LOTUS studies. (external link)
• Jan Gunnar Hatlebakk; Frank Zerbib; Stanislas Bruley des Varannes et al. (2016). Gastroesophageal Acid Reflux Control 5 Years After Antireflux Surgery, Compared With Long-term Esomeprazole Therapy. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Hege Østgaard et al. (2012). Low Densities of Serotonin and Peptide YY Cells in the Colon of Patients with Irritable Bowel Syndrome. (external link)
• Magdhy El-Salhy; Mads Johansson; Miriam Klevstul et al. (2025). Quality of life, functional impairment and healthcare experiences of patients with irritable bowel syndrome in Norway: an online survey. (external link)
• Hanna Fjeldheim Dale; Caroline Jensen; Trygve Hausken et al. (2019). Acute effect of a cod protein hydrolysate on postprandial acylated ghrelin concentration and sensations associated with appetite in healthy subjects: a double-blind crossover trial. (external link)
• Caroline Jensen; Hanna Fjeldheim Dale; Trygve Hausken et al. (2020). Supplementation with low doses of a cod protein hydrolysate on glucose regulation and lipid metabolism in adults with metabolic syndrome: A randomized, double-blind study. (external link)
• Magdhy El-Salhy; Odd Helge Gilja; Jan Gunnar Hatlebakk (2023). Factors affecting the outcome of fecal microbiota transplantation for patients with irritable bowel syndrome. (external link)
• Elisabeth Kjelsvik Steinsvik; Jan Gunnar Hatlebakk; Trygve Hausken et al. (2021). Ultrasound imaging for assessing functions of the GI tract. (external link)
• Jan Gunnar Hatlebakk; Arnold Berstad (1997). Endoscopic grading of reflux oesophagitis: what observations correlate with gastro-oesophagal reflux?. (external link)
• Jan Gunnar Hatlebakk; F. Johnsson; M. Vilien et al. (1997). The effect of cisapride in maintaining symptomatic remission in patients with gastro-oesophageal reflux disease. (external link)
• Jan Gunnar Hatlebakk; Arnold Berstad (1997). Prognostic factors for relapse of reflux oesophagitis and symptoms during 12 months of therapy with lansoprazole. (external link)
• Arnold Berstad; Jan Gunnar Hatlebakk; H. Maartmann-Moe et al. (1997). Helicobacter pylori gastritis and epithelial cell proliferation in patients with reflux oesophagitis after treatment with lansoprazole. (external link)
• Jan Gunnar Hatlebakk; Arnold Berstad; Lasse Carling et al. (1993). Lansoprazole versus omeprazole in short-term treatment of reflux oesophagitis. Results of a Scandinavian multicentre trial. (external link)
• Jan Gunnar Hatlebakk; Arnold Berstad (1997). Lansoprazole 15 and 30 mg daily in maintenance therapy of reflux oesophagitis. (external link)
• Elin-johanne Katle; Jan Gunnar Hatlebakk; Roald Omdal et al. (2019). Nasal and salivary pepsin as a biomarker for gastro-esophageal reflux in chronic rhinosinusitis. (external link)
• Khanh Do-Cong Pham; Sigurd Lauritzen; Erling Tjora et al. (2022). The outcome of primary per oral endoscopic myotomy (POEM) for treatment of achalasia: Norwegian single-center experience with long-term follow-up. (external link)
• Julio Ponce; Vicente Garrigues; Lars Agréus et al. (2012). Structured management strategy based on the Gastro-oesophageal Reflux Disease (GERD) Questionnaire (GerdQ) vs. usual primary care for GERD: pooled analysis of five cluster-randomised European studies. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2006). A multimodal laser Doppler and endosonographic distension device for studying mechanosensation and mucosal blood flow in the oesophagus. (external link)
• Magdy El-Salhy; Tarek Mazzawi; Trygve Hausken et al. (2022). The fecal microbiota transplantation response differs between patients with severe and moderate irritable bowel symptoms. (external link)
• Birgitte Berentsen; Bharath Halandur Nagaraja; Erica Persson Teige et al. (2020). Study protocol of the Bergen brain-gut-microbiota-axis study: A prospective case-report characterization and dietary intervention study to evaluate the effects of microbiota alterations on cognition and anatomical and functional brain connectivity in patients with irritable bowel syndrome. (external link)
• Ans Pauwels; Veerle Boecxstaens; Christopher N. Andrews et al. (2019). How to select patients for antireflux surgery? The ICARUS guidelines (international consensus regarding preoperative examinations and clinical characteristics assessment to select adult patients for antireflux surgery). (external link)
• Magdy El-Salhy; Tarek Mazzawi; Trygve Hausken et al. (2022). Irritable bowel syndrome patients who are not likely to respond to fecal microbiota transplantation. (external link)
• Magdy El-Salhy; Odd Helge Gilja; Doris Irene Gundersen et al. (2014). Duodenal Chromogranin A Cell Density as a Biomarker for the Diagnosis of Irritable Bowel Syndrome. (external link)
• Ragna Anne Lind; Arnold Berstad; Jan G Hatlebakk et al. (2013). Chronic fatigue in patients with unexplained self-reported food hypersensitivity and irritable bowel syndrome: validation of a Norwegian translation of the Fatigue Impact Scale. (external link)
• Christian Jonasson; Börje Wernersson; Dag Arne Lihaug Hoff et al. (2013). Validation of the GerdQ questionnaire for the diagnosis of gastro-oesophageal reflux disease. (external link)
• Julio Ponce; Vicente Garrigues; Lars Agréus et al. (2011). Structured management strategy versus usual care for gastroesophageal reflux disease: rationale for pooled anlysis of five European cluster-randomized studies. (external link)
• Magdy El-Salhy; Tarek Mazzawi; Doris Irene Gundersen et al. (2013). Changes in the symptom pattern and the densities of large-intestinal endocrine cells following Campylobacter infection in irritable bowel syndrome: a case report. (external link)
• Jean-Paul Galmiche; Jan G Hatlebakk; Stephen E. A. Attwood et al. (2011). Laparoscopic Antireflux Surgery vs Esomeprazole Treatment for Chronic GERD The LOTUS Randomized Clinical Trial. (external link)
• Magdy El-Salhy; Ingvild Haukaas Wendelbo; Doris Irene Gundersen et al. (2013). Evaluation of the usefulness of colonoscopy with mucosal biopsies in the follow-up of TNBS-induced colitis in rats. (external link)
• Magdy El-Salhy; Trygve Hausken; Jan Gunnar Hatlebakk (2019). Increasing the Dose and/or Repeating Faecal Microbiota Transplantation (FMT) Increases the Response in Patients with Irritable Bowel Syndrome (IBS). (external link)
• Javier P. Gisbert; Alun Cooper; Dimitrios Karagiannis et al. (2009). Management of gastro-oesophageal reflux disease in primary care: a European observational study. (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk (2016). Changes in enteroendocrine and immune cells following colitis induction by TNBS in rats. (external link)
• Magdhy El-Salhy; Odd Helge Gilja; Jan Gunnar Hatlebakk (2024). Factors underlying the long-term efficacy of faecal microbiota transplantation for patients with irritable bowel syndrome. (external link)
• Tonje Nesvik Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2017). Effects of varying dietary content of fermentable short-chain carbohydrates on symptoms, fecal microenvironment, and cytokine profiles in patients with irritable bowel syndrome. (external link)

Academic literature review

• Magdhy El-Salhy; Maura Corsetti; Odd Helge Gilja et al. (2026). Towards a Standard Protocol for Fecal Microbiota Transplantation in Irritable Bowel Syndrome. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Odd Helge Gilja et al. (2014). Is irritable bowel syndrome an organic disorder?. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2013). Clinical presentation, diagnosis, pathogenesis and treatment options for lymphocytic colitis (Review). (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk; Odd Helge Gilja et al. (2015). The relation between celiac disease, nonceliac gluten sensitivity and irritable bowel syndrome. (external link)
• Magdy El-Salhy; Rune Svensen; Jan G Hatlebakk et al. (2014). Chronic constipation and treatment options (Review). (external link)
• John Dent; Peter J. Kahrilas; Nimish Vakil et al. (2008). Clinical trial design in adult reflux disease: a methodological workshop. (external link)
• Magdy El-Salhy; Trygve Hausken; Jan Gunnar Hatlebakk (2021). Current status of fecal microbiota transplantation for irritable bowel syndrome. (external link)
• Elin Johanne Katle; Jan G Hatlebakk; Sverre K Steinsvåg (2013). Gastroesophageal Reflux and Rhinosinusitis. (external link)
• Magdy El-Salhy; Tarek Mazzawi; Doris Irene Gundersen et al. (2013). The role of peptide YY in gastrointestinal diseases and disorders (Review). (external link)
• Magdy El-Salhy; Trygve Hausken; Odd Helge Gilja et al. (2016). The possible role of gastrointestinal endocrine cells in the pathophysiology of irritable bowel syndrome. (external link)
• Magdy El-Salhy; Odd Helge Gilja; Doris Irene Gundersen et al. (2014). Interaction between ingested nutrients and gut endocrine cells in patients with irritable bowel syndrome (Review). (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2012). Irritable bowel syndrome: treatment options. (external link)
• Magdy El-Salhy; Solomon Tefera; Trygve Hausken et al. (2017). Gastrointestinal neuroendocrine peptides/amines in inflammatory bowel Disease. (external link)
• Mattis Bekkelund; Dag André Sangnes; Jan Gunnar Hatlebakk et al. (2019). Pathophysiology of idiopathic gastroparesis and implications for therapy. (external link)
• Magdy El-Salhy; Jan Gunnar Hatlebakk; Trygve Hausken (2019). Possible role of peptide YY (PYY) in the pathophysiology of irritable bowel syndrome (IBS). (external link)
• Camilla Christensen; Andrea Knudsen; Erik Kristoffer Arnesen et al. (2024). Diet, Food, and Nutritional Exposures and Inflammatory Bowel Disease or Progression of Disease: an Umbrella Review. (external link)
• Magdy El-Salhy; Jan G Hatlebakk; Odd Helge Gilja et al. (2014). Irritable bowel syndrome: recent developments in diagnosis, pathophysiology, and treatment. (external link)
• Asbjørn Mohr Drewes; Pia Munkholm; Magnus Simrén et al. (2016). Definition, diagnosis and treatment strategies for opioid-induced bowel dysfunction-Recommendations of the Nordic Working Group. (external link)

Conference lecture

• Khanh Do-Cong Pham; Roald Flesland Havre; Jan Gunnar Hatlebakk (2019). CHROMOENDOSCOPY WITH IODINE-POTASSIUM IODINE SOLUTION IN EOSINOPHILIC ESOPHAGITIS. (external link)
• Solomon Tefera; Odd Helge Gilja; Edda Jonina Olafsdottir et al. (2000). Intragastric maldistribution in patients with reflux oesophagitis studied by an accurate 3D ultrasound system. (external link)
• Rolf Carlsson; Folke Johnsson; Jan Gunnar Hatlebakk et al. (2000). Evaluation of a symptomatic score for the diagnosis of GERD. (external link)
• Erica Persson Teige; Birgitte Berentsen; Ingeborg Brønstad et al. (2020). Short and extended effects of a low FODMAP diet on symptoms and short-chained fatty acids in patients with irritable bowel syndrome. (external link)
• Magdy El-Salhy; Jørgen Valeur; Ingeborg Brønstad et al. (2025). The possible role of butyric acid in long-term symptom relief in irritable bowel syndrome patients following fecal microbiota transplantation. (external link)
• Tonje Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2016). Low FODMAP diet alters symptoms, microbiota, short-chain fatty acids and cytokine profiles in patients with IBS: A randomized controlled trial. (external link)
• A. Berstad; Jan Gunnar Hatlebakk (1993). Lansoprazole in the treatment of reflux oesophagitis: A survey of clinical studies. (external link)
• Jan Gunnar Hatlebakk (1996). Transient LES-relaksasjon ved reflukssykdom. (external link)
• Jan Gunnar Hatlebakk (1996). Utredning av ikke-kardiale brystsmerter. (external link)
• Magdy El-Salhy; Anja Bråthen Kristoffersen; Jørgen Valeur et al. (2020). Long-term effects of faecal microbiota transplantation (FMT) in patients with irritable bowel syndrome. (external link)
• Eirik Persson Teige; Eline Margrete Randulff Hillestad; Birgitte Berentsen et al. (2021). Kort- og langtidseffekten av lav FODMAP-dietten på symptomer og kortkjedede fettsyrer hos pasienter med irritabel tarmsyndrom. (external link)
• Khanh Do-Cong Pham; Asgaut Viste; Jan Gunnar Hatlebakk et al. (2014). Per Oral Endoskpoisk Myotmi (POEM) for behandling av akalasi. (external link)
• Khanh Do-Cong Pham; Asgaut Viste; Jan Gunnar Hatlebakk (2013). Endoskopisk behandling av tidlig spiserøreskreft. (external link)
• Khanh Do-Cong Pham; Asgaut Viste; Aly Dicko et al. (2015). Per Oral Endoskopisk Pyloromyotomi (POP) for primær pylorusstensose. (external link)
• Ingvard Wilhelmsen; Jan Gunnar Hatlebakk; Snorri Olafsson et al. (1998). On demand therapy of reflux oesophagitis: a study of symptoms, patient satisfaction and quality of life. (external link)
• A. Berstad; R. Weberg; Ingvard Wilhelmsen et al. (1994). Follow-up on 227 Patients with Peptic Ulcer Disease One Year after Eradication of Helicobacter Pylori. (external link)
• Birgitte Berentsen; Camilla Kristianslund; Gülen Arslan Lied et al. (2019). Mage-tarmskolen – tverrfaglig internetbehandling ved Irritabel tarmsyndrom. (external link)
• Jan Gunnar Hatlebakk; Lars B Nesje; Trygve Hausken et al. (1994). Lansoprazole and amoxicillin oral suspension in the treatment of peptic ulcer disease. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2007). Distensjonsutløyst smerte i øsofagus hjå friske korrelerer med vegg-stress og -strain, men ikkje med mucosa perfusjon. (external link)
• Dag Arne Lihaug Hoff; Anne Lund Krarup; Dina Lelic et al. (2012). No differences in central sensory (pain) processing to oesophageal pain between patients with non-cardiac chest pain and healthy subjects. (external link)
• Dag Arne Lihaug Hoff; Anne Lund Krarup; Dina Lelic et al. (2013). Sentral sensorisk prosessering av smertestimulering i øsofagus hjå pasientar med ikkje-kardiale brystsmerter og frisk personar.. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2012). No differences in central sensory (pain) processing to oesophageal pain between patients with non-cardiac chest pain and healthy subjects.. (external link)
• Khanh Do-Cong Pham; Roald Flesland Havre; Erlend Fagertun Hofstad et al. (2017). Navigated Retrograde Endoscopic Myotomy (REM) for the Treatment of Therapy-Resistant Achalasia. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2010). Pasientar med funksjonelle brystsmerter har ein meir markert muskeltonus i øsofagus under bag (ballong) ekspansjon.. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2008). Distension-induced pain in the oesophagus correlates with wall stress and strain but not with mucosal perfusion in healthy volunteers. (external link)
• Magdy El-Salhy; Jørgen Valeur; Ingeborg Brønstad et al. (2025). Kortkjedede fettsyrer etter FMT. (external link)
• Tarek Mazzawi; Trygve Hausken; Johannes Espolin Roksund Hov et al. (2019). Effect of faecal microbiota transplantation on gut microenvironment and symptoms in patients with irritable bowel syndrome. (external link)
• Tonje Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2016). Low FODMAP diet alters symptoms, microbiota, short-chain fatty acids and cytokine profiles in patients with IBS: A randomized controlled trial. (external link)
• Roald Flesland Havre; Jan Gunnar Hatlebakk; Odd Helge Gilja (2020). Chromoendoscopy with Iodine-Potassium iodine solution in eosinophilic esophagitis. (external link)
• Erica Teig; Birgitte Berentsen; Trygve Hausken et al. (2020). Kort- og langtidseffekten av lavFODMAP-diett på symptomer og mikrobiota hos pasienter med IBS. (external link)
• Eline M R Hillestad; Gülen Arslan Lied; Elisabeth Kjelsvik Steinsvik et al. (2020). Kvalitetsevaluering av tverrfaglig IBS-poliklinikk. (external link)

Journal corrigendum

• Hanna Fjeldheim Dale; Caroline Jensen; Trygve Hausken et al. (2019). Effect of a cod protein hydrolysate on postprandial glucose metabolism in healthy subjects: A double-blind cross-over trial - CORRIGENDUM. (external link)

Conference poster

• Khanh Do-Cong Pham; Roald Flesland Havre; Odd Helge Gilja et al. (2019). OUTCOME OF PER ORAL ENDOSCOPIC MYOTOMY FOR TREATMENT OF ACHALASIA - NORWEGIAN SINGLE CENTER EXPERIENCE WITH MEDIAN FOLLOWING-UP OF 24 MONTHS. (external link)
• Birgitte Berentsen; HN Bharath; Astrid Lundervold et al. (2019). Brain-Gut-Microbiota Interaction in Irritable Bowel Syndrome: A Multidimensional Approach. (external link)
• Tonje Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2016). Low versus high FODMAP diet in patients with irritable bowel syndrome. (external link)
• Tonje Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2016). Low FODMAP diet alters symptoms, microbiota, short-chain fatty acids and cytokine profiles in patients with IBS: A randomized controlled trial. (external link)
• Tarek Mazzawi; Jørgen Valeur; Trygve Hausken et al. (2017). Effect of faecal microbiota transplantation on gut bacterial fermentation products in patients with irritable bowel syndrome. (external link)
• Hanna Fjeldheim Dale; Jan Gunnar Hatlebakk; Nils Hovdenak et al. (2017). The effect of a controlled gluten challenge in patients with suspected non-coeliac gluten sensitivity: A randomized, double-blind placebo-controlled challenge. (external link)
• Eline Hillestad; Gülen Arslan Lied; Elisabeth Kjelsvik Steinsvik et al. (2019). Evaluation of a tertiary, multidisciplinary outpatient clinic for irritable bowel syndrome. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Johannes Espolin Roksund Hov et al. (2018). Effects of faecal microbiota transplantation on gut microenvironment and symptoms in patients with irritable bowel syndrome. (external link)
• Caroline Jensen; Hanna Fjeldheim Dale; Trygve Hausken et al. (2018). The effect of a cod protein hydrolysate on postprandial glucose metabolism in healthy subjects. (external link)
• Tonje Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2016). Low FODMAP diet – just placebo? Low versus high FODMAP diet in patients with irritable bowel syndrome. (external link)
• Phil O Katz; Joel Silman; David Katzka et al. (1998). H.pylori infection increases nocturnal acid control on proton pump inhibitors. (external link)
• Magdy El-Salhy; Jørgen Valeur; Ingeborg Brønstad et al. (2024). Faecal butyric acid levels are increased at 2 and 3 years after faecal microbiota transplantation (FMT) in patients with irritable bowel syndrome (IBS). (external link)
• Inge Berg Nilssen; Hans Gregersen; Svein Ødegaard et al. (2010). In patients with functional chest pain, sensation elicited during oesophageal bag distension is mechanical rather than ischemic in origin. (external link)
• Dag Arne Lihaug Hoff; Anne Lund Krarup; Dina Lelic et al. (2012). No differences in central sensory (pain) processing to oesophageal pain between patients with non-cardiac chest pain and healthy subjects. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2010). Sensation elicited during distension in the oesophagus in patients with functional chest pain is caused by mechanical factors rather than by mucosal ischemia.. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2007). Distensjonsutløyst smerte i øsofagus hjå friske korrelerer med vegg-stress og -strain, men ikkje med mucosa perfusjon. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2007). Pain mechanisms of the esophagus in healthy humans studied by laser Doppler flowmetry.. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2008). Development of a multimodal device incorporating laser Doppler flowmetry to study oesophageal pain mechanisms. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2008). Distension-induced pain in the esophagus correlates with wall stress and strain but not with mucosal perfusion in healthy volunteers.. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2006). Development of a multimodal device incorporating laser Doppler flowmetry to study oesophageal pain mechanisms. (external link)
• Magdy El-Salhy; Christina Casén; Jørgen Valeur et al. (2021). Responses to faecal microbiota transplantation in female and male patients with irritable bowel syndrome. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Johannes Espolin Roksund Hov et al. (2018). Correlations between gut microenvironment and symptoms in patients with diarrhea-predominant irritable bowel syndrome. (external link)

Conference abstract

• Magdy El-Salhy; Jørgen Valeur; Trygve Hausken et al. (2020). Changes in fecal short-chain fatty acids (SCFA) following fecal microbiota transplantation (FMT) in patients with irritable bowel syndrome (IBS). (external link)
• Trygve Hausken; Vernesa Dizdar; Kurt Hanevik et al. (2012). Duodenal mucosal lymphocyte subgroups in patients with persisting abdominal symptoms after Giardia lamblia infection. (external link)
• Dag Arne Lihaug Hoff; DAL Hoff; Hans Gregersen et al. (2010). Patients with functional chest pain have an increased oesophageal wall tone during bag distension. (external link)
• C Jonasson; Eivind Jørgensen; Ingunn Fride Tvete et al. (2009). Changes in prescriptions dispensed for proton pump inhibitors (PPIs) following new restrictions on reimbursement - a nationwide Norwegian prescription database study. (external link)
• C Jonasson; Ingunn Fride Tvete; Eivind Jørgensen et al. (2009). CHANGES IN PRESCRIPTIONS DISPENSED ON PROTON PUMP INHIBITORS (PPIS) FOLLOWING NEW RESTRICTIONS FOR REIMBURSEMENT - A NATIONWIDE NORWEGIAN PRESCRIPTION DATABASE STUDY. (external link)
• Hanna Fjeldheim Dale; Jan Gunnar Hatlebakk; Nils Hovdenak et al. (2017). The effect of a controlled gluten challenge in patients with suspected non-coeliac gluten sensitivity: A randomized, double-blind placebo-controlled challenge. (external link)
• Magdy El-Salhy; Anja Bråthen Kristoffersen; Jørgen Valeur et al. (2020). Long-term effects of faecal microbiota transplantation (FMT) in patients with irritable bowel syndrome. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Johannes Espolin Roksund Hov et al. (2018). Effects of faecal microbiota transplantation on gut microenvironment and symptoms in patients with irritable bowel syndrome. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2009). Mechanosensation and mucosal blood perfusion during bag distension in the esophagus in patients with functional chest pain. (external link)
• Hildur Skuladottir; Jan Gunnar Hatlebakk; Trygve Hausken (2007). Postprandial symptoms in healthy subjects improve in the left lateral supine position. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Magdy El-Salhy et al. (2016). Kinetics of microbial community composition in patients with diarrhea-predominant irritable bowel syndrome following faecal microbiota transplantation. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Magdy El-Salhy et al. (2016). Effect of fecal microbiota transplantation on the symptoms and duodenal enteroendocrine cells in patients with irritable bowel syndrome. (external link)
• Eline Lundekvam Storlid; Trygve Hausken; Gülen Arslan Lied et al. (2016). The Gastric Accomodation Reflex Studied by Ultrasound, Manometry and Impedancemetry in a Pilot Study. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Hilde K Østgaard et al. (2011). Low densities of serotonin and peptide YY cells in the colon of patients with irritable bowel syndrome. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2009). Mechanosensation and mucosal blood perfusion during bag distension in the esophagus in patients with functional chest pain.. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2007). Distension-induced pain in the esophagus correlates with wall stress and strain but not with mucosal perfusion in healthy volunteers.. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2010). Patients with functional chest pain have a higher wall tone during bag distention. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2006). . Pain mechanisms of the oesophagus in healthy humans studied by laser Doppler flowmetry.. (external link)
• Hans Gregersen; Dag Arne Lihaug Hoff; Svein Ødegaard et al. (2006). Distenstion-induced sensory responses in the esophagus of healthy human are due to mechanical rather than ischemic mechanics. (external link)
• Magdy El-Salhy; Christina Casén; Jørgen Valeur et al. (2021). Responses to faecal microbiota transplantation in female and male patients with irritable bowel syndrome. (external link)
• Dag Arne Lihaug Hoff; Anne Lund Krarup; Dina Lelic et al. (2012). No differences in central sensory (pain) processing to oesophageal pain between patients with non-cardiac chest pain and healthy subjects. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk; Hans Gregersen (2004). Laser Doppler flowmetry, endosonography and bag distension as a multimode device for studying biomechanics and blood flow in the porcine oesophagus.. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2009). Sensation elicited during distension in the oesophagus in patients with functional chest pain is caused by mechanical factors rather than by mucosal ischemia.. (external link)
• Dag Arne Lihaug Hoff; Hans Gregersen; Svein Ødegaard et al. (2005). Development of a multimodal device incorporating laser Doppler flowmetry to study oesophageal pain mechanisms.. (external link)
• Trygve Hausken; Tarek Mazzawi; Gülen Arslan Lied et al. (2017). Effect of faecal microbiota transplantation on the symptoms and gut microbiota in patients with irritable bowel syndrome (IBS). (external link)
• Jan Gunnar Hatlebakk; Nils Hovdenak; Synne Otteraaen Ystad et al. (2017). Gluten causes symptom relapse in a small group of patients with suspected non-celiac gluten sensitivity: A randomized, double-blind placebo controlled challenge. (external link)
• Tarek Mazzawi; Jørgen Valeur; Trygve Hausken et al. (2017). Effect of faecal microbiota transplantation on gut bacterial fermentation products in patients with irritable bowel syndrome. (external link)
• Birgitte Berentsen; Camilla Thuen; Mari Liltvedt Andersen et al. (2018). Interdisciplinary self- help intervention for IBS - eHealth and patient education. (external link)
• Magdy El-Salhy; Jørgen Valeur; Ingeborg Brønstad et al. (2024). Faecal butyric acid levels are increased at 2 and 3 years after faecal microbiota transplantation (FMT) in patients with irritable bowel syndrome (IBS). (external link)
• Tonje Hustoft; Trygve Hausken; Synne Otteraaen Ystad et al. (2016). Low FODMAP diet alters symptoms, microbiota, short-chain fatty acids and cytokine profiles in patients with IBS: A randomized controlled trial. (external link)

Encyclopedia entry

• Jan Gunnar Hatlebakk; Phil O Katz; Donald O Castell (1999). The medically refractory patient - when proton pump inhibitors fail. (external link)

Lecture

• Solomon Tefera; Odd Helge Gilja; Jan Gunnar Hatlebakk et al. (1999). Gastric accommodation in patients with gastro-oesophageal reflux disease. (external link)
• Håvard Hatle; Jan G Hatlebakk; Dag Arne Lihaug Hoff (2013). Gravid kvinne med akutt pustebesvær. (external link)
• Solomon Tefera; Odd Helge Gilja; Jan Gunnar Hatlebakk et al. (1999). Completely opposite gastric accommodation patterns in functional dyspepsia patient and reflux oesophagitis. (external link)
• C Mattson; L Kundell; J Carlsson et al. (1999). Quality of life in the long term management og gastroesophageal reflux disease treated with omeprazole or antireflux surgery. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2014). Vomiting - Cyclic Vomiting. (external link)
• Tarek Mazzawi; Gülen Arslan Lied; Magdy El-Salhy et al. (2016). Kinetics of microbial community composition in patients with diarrhea-predominant irritable bowel syndrome following faecal microbiota transplantation. (external link)
• Håvard Hatle; Jan Gunnar Hatlebakk; Dag Arne Lihaug Hoff (2013). Gravid kvinne med akutt pustebesvær. (external link)
• Mattis Bekkelund; Dag André Sangnes; Jørgen Valeur et al. (2023). Nausea associated to subsegmental intestinal hypomotility in diabetic gastroenteropathy. (external link)

Popular science article

• Jan G Hatlebakk; Birgitte-Elise G Emken; Valerij Glazkov et al. (2013). Correct use of proton pump inhibitors for gastro-oesophageal reflux disease. (external link)
• Khanh Do-Cong Pham; Asgaut Viste; Jan Gunnar Hatlebakk et al. (2014). Per Oral Endoksopisk Myotomi (POEM)for akalasi. (external link)

Doctoral thesis (PhD)

• Jan Gunnar Hatlebakk (1997). Diagnosis and treatment of uncomplicated reflux oesophagitis. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2010). Esophageal pain sensation during bag distention - biomechanical or ischemic in origin? : studied by a multi-modal device incorporating laser Doppler flowmetry, endosonography, manometry, and bag distension. (external link)
• Caroline Jensen; Dag Arne Lihaug Hoff; Gülen Arslan Lied et al. (2021). Supplementation with cod protein hydrolysate : Intervention studies in healthy adults and adults with metabolic syndrome. (external link)
• Hanna Fjeldheim Dale; Gülen Arslan Lied; Jan Gunnar Hatlebakk et al. (2020). Health effects of supplementation with cod protein hydrolysate: Impact on glucose metabolism and appetite in healthy subjects and gut health in irritable bowel syndrome. (external link)

Media feature article

• Jan Gunnar Hatlebakk; Per H. Madsen; Per O. Walle et al. (2000). Heartburn treatment in primary care. Letter to the editor. (external link)

Letter to the editor

• Jan Gunnar Hatlebakk (2004). Intravenous esomeprazole - Viewpoint. (external link)
• Jan G Hatlebakk; Frode Lerang; Bjørn Moum (2010). Protonpumpehemmere gir ikke magekreft. (external link)
• Magdy El-Salhy; Trygve Hausken; Jan Gunnar Hatlebakk (2020). Letter: faecal microbiota transplantation for irritable bowel syndrome—which improvements are required?. (external link)
• Magdhy El-Salhy; Odd Helge Gilja; Jan Gunnar Hatlebakk (2023). Letter: A step forward towards a standard FMT protocol for IBS. (external link)

Journal review

• Jørgen Valeur; Trygve Hausken; Jan Gunnar Hatlebakk et al. (2021). Minneord: Arnold Berstad (1940-2020). (external link)

Non-fiction monograph

• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2012). Irritable Bowel Syndrome: Diagnosis, Pathogenesis and Treatment Options. (external link)

Media interview

• Wilma Bergseth; Eirik Garnås; Jan Gunnar Hatlebakk et al. (2023). Expert: Så kan viss kost minska IBS-symtom. (external link)
• Wilma Bergseth; Eirik Garnås; Jan Gunnar Hatlebakk et al. (2023). IBS-funn: − Kan gi betydelig symptomreduksjon. (external link)

Professional article

• Isaac Essilfie; Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2007). Behandling av gastroøsofageal reflukssykdom. (external link)
• Dag Arne Lihaug Hoff; Jan Gunnar Hatlebakk (2013). Ultralyd brukt i diagnostikken av ikkje-kardiale brystsmerter. (external link)

Editorial/Leader article

• Luca Mastracci; Roberto Fiocca; Cecilia Engström et al. (2017). Editorial: the diminishing returns of normalisation of the oesophageal mucosa-Authors' reply. (external link)

Academic book chapter

• Solomon Tefera; Jan Gunnar Hatlebakk (2005). Ultrasound in Patients with Gastroesophageal Reflux Disease. (external link)
• Jan Gunnar Hatlebakk (1993). Verdi av pH-måling og manometri status 1993. (external link)
• Magdy El-Salhy; Doris Irene Gundersen; Jan G Hatlebakk et al. (2013). Diet and Irritable Bowel Syndrome, with a Focus on Appetite-Regulating Gut Hormones. (external link)

Academic monograph

• Magdy El-Salhy; Jan G Hatlebakk; Trygve Hausken (2015). Understanding and Controlling the Irritable Bowel. (external link)

Non-fiction book chapter

• Jan Gunnar Hatlebakk; Birgitte-Elise G Emken (2017). Sykdommer i øsofagus. (external link)

See a complete overview of publications in NVA.