Academic article

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

Academic lecture

• El-Salhy, Magdy; Valeur, Jørgen; Brønstad, Ingeborg 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)
• El-Salhy, Magdy; Valeur, Jørgen; Brønstad, Ingeborg et al. (2025). Kortkjedede fettsyrer etter FMT. (external link)
• Teige, Eirik Persson; Hillestad, Eline Margrete Randulff; Berentsen, Birgitte et al. (2021). Kort- og langtidseffekten av lav FODMAP-dietten på symptomer og kortkjedede fettsyrer hos pasienter med irritabel tarmsyndrom. (external link)
• Teige, Erica Persson; Berentsen, Birgitte; Brønstad, Ingeborg 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)
• El-Salhy, Magdy; Kristoffersen, Anja Bråthen; Valeur, Jørgen et al. (2020). Long-term effects of faecal microbiota transplantation (FMT) in patients with irritable bowel syndrome. (external link)
• Havre, Roald Flesland; Hatlebakk, Jan Gunnar; Gilja, Odd Helge (2020). Chromoendoscopy with Iodine-Potassium iodine solution in eosinophilic esophagitis. (external link)
• Teig, Erica; Berentsen, Birgitte; Hausken, Trygve et al. (2020). Kort- og langtidseffekten av lavFODMAP-diett på symptomer og mikrobiota hos pasienter med IBS. (external link)
• Hillestad, Eline M R; Lied, Gülen Arslan; Steinsvik, Elisabeth Kjelsvik et al. (2020). Kvalitetsevaluering av tverrfaglig IBS-poliklinikk. (external link)
• Pham, Khanh Do-Cong; Havre, Roald Flesland; Hatlebakk, Jan Gunnar (2019). CHROMOENDOSCOPY WITH IODINE-POTASSIUM IODINE SOLUTION IN EOSINOPHILIC ESOPHAGITIS. (external link)
• Berentsen, Birgitte; Kristianslund, Camilla; Lied, Gülen Arslan et al. (2019). Mage-tarmskolen – tverrfaglig internetbehandling ved Irritabel tarmsyndrom. (external link)
• Mazzawi, Tarek; Hausken, Trygve; Hov, Johannes Espolin Roksund et al. (2019). Effect of faecal microbiota transplantation on gut microenvironment and symptoms in patients with irritable bowel syndrome. (external link)
• Pham, Khanh Do-Cong; Havre, Roald Flesland; Hofstad, Erlend Fagertun et al. (2017). Navigated Retrograde Endoscopic Myotomy (REM) for the Treatment of Therapy-Resistant Achalasia. (external link)
• Hustoft, Tonje; Hausken, Trygve; Ystad, Synne Otteraaen 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)
• Hustoft, Tonje; Hausken, Trygve; Ystad, Synne Otteraaen 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)
• Pham, Khanh Do-Cong; Viste, Asgaut; Dicko, Aly et al. (2015). Per Oral Endoskopisk Pyloromyotomi (POP) for primær pylorusstensose. (external link)
• Pham, Khanh Do-Cong; Viste, Asgaut; Hatlebakk, Jan Gunnar et al. (2014). Per Oral Endoskpoisk Myotmi (POEM) for behandling av akalasi. (external link)
• Pham, Khanh Do-Cong; Viste, Asgaut; Hatlebakk, Jan Gunnar (2013). Endoskopisk behandling av tidlig spiserøreskreft. (external link)
• Hoff, Dag Arne Lihaug; Krarup, Anne Lund; Lelic, Dina et al. (2013). Sentral sensorisk prosessering av smertestimulering i øsofagus hjå pasientar med ikkje-kardiale brystsmerter og frisk personar.. (external link)
• Hoff, Dag Arne Lihaug; Krarup, Anne Lund; Lelic, Dina 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)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (2012). No differences in central sensory (pain) processing to oesophageal pain between patients with non-cardiac chest pain and healthy subjects.. (external link)
• Hoff, Dag Arne Lihaug; Gregersen, Hans; Ødegaard, Svein et al. (2010). Pasientar med funksjonelle brystsmerter har ein meir markert muskeltonus i øsofagus under bag (ballong) ekspansjon.. (external link)
• Hoff, Dag Arne Lihaug; Gregersen, Hans; Ødegaard, Svein 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)
• Hoff, Dag Arne Lihaug; Gregersen, Hans; Ødegaard, Svein et al. (2007). Distensjonsutløyst smerte i øsofagus hjå friske korrelerer med vegg-stress og -strain, men ikkje med mucosa perfusjon. (external link)
• Tefera, Solomon; Gilja, Odd Helge; Olafsdottir, Edda Jonina et al. (2000). Intragastric maldistribution in patients with reflux oesophagitis studied by an accurate 3D ultrasound system. (external link)
• Carlsson, Rolf; Johnsson, Folke; Hatlebakk, Jan Gunnar et al. (2000). Evaluation of a symptomatic score for the diagnosis of GERD. (external link)
• Wilhelmsen, Ingvard; Hatlebakk, Jan Gunnar; Olafsson, Snorri et al. (1998). On demand therapy of reflux oesophagitis: a study of symptoms, patient satisfaction and quality of life. (external link)
• Hatlebakk, Jan Gunnar (1996). Transient LES-relaksasjon ved reflukssykdom. (external link)
• Hatlebakk, Jan Gunnar (1996). Utredning av ikke-kardiale brystsmerter. (external link)
• Berstad, A.; Weberg, R.; Wilhelmsen, Ingvard et al. (1994). Follow-up on 227 Patients with Peptic Ulcer Disease One Year after Eradication of Helicobacter Pylori. (external link)
• Hatlebakk, Jan Gunnar; Nesje, Lars B; Hausken, Trygve et al. (1994). Lansoprazole and amoxicillin oral suspension in the treatment of peptic ulcer disease. (external link)
• Berstad, A.; Hatlebakk, Jan Gunnar (1993). Lansoprazole in the treatment of reflux oesophagitis: A survey of clinical studies. (external link)

Academic literature review

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

Poster

• El-Salhy, Magdy; Valeur, Jørgen; Brønstad, Ingeborg 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)
• El-Salhy, Magdy; Casén, Christina; Valeur, Jørgen et al. (2021). Responses to faecal microbiota transplantation in female and male patients with irritable bowel syndrome. (external link)
• Pham, Khanh Do-Cong; Havre, Roald Flesland; Gilja, Odd Helge 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)
• Berentsen, Birgitte; Bharath, HN; Lundervold, Astrid et al. (2019). Brain-Gut-Microbiota Interaction in Irritable Bowel Syndrome: A Multidimensional Approach. (external link)
• Hillestad, Eline; Lied, Gülen Arslan; Steinsvik, Elisabeth Kjelsvik et al. (2019). Evaluation of a tertiary, multidisciplinary outpatient clinic for irritable bowel syndrome. (external link)
• Mazzawi, Tarek; Lied, Gülen Arslan; Hov, Johannes Espolin Roksund et al. (2018). Effects of faecal microbiota transplantation on gut microenvironment and symptoms in patients with irritable bowel syndrome. (external link)
• Jensen, Caroline; Dale, Hanna Fjeldheim; Hausken, Trygve et al. (2018). The effect of a cod protein hydrolysate on postprandial glucose metabolism in healthy subjects. (external link)
• Mazzawi, Tarek; Lied, Gülen Arslan; Hov, Johannes Espolin Roksund et al. (2018). Correlations between gut microenvironment and symptoms in patients with diarrhea-predominant irritable bowel syndrome. (external link)
• Mazzawi, Tarek; Valeur, Jørgen; Hausken, Trygve et al. (2017). Effect of faecal microbiota transplantation on gut bacterial fermentation products in patients with irritable bowel syndrome. (external link)
• Dale, Hanna Fjeldheim; Hatlebakk, Jan Gunnar; Hovdenak, Nils 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)
• Hustoft, Tonje; Hausken, Trygve; Ystad, Synne Otteraaen et al. (2016). Low versus high FODMAP diet in patients with irritable bowel syndrome. (external link)
• Hustoft, Tonje; Hausken, Trygve; Ystad, Synne Otteraaen 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)
• Hustoft, Tonje; Hausken, Trygve; Ystad, Synne Otteraaen et al. (2016). Low FODMAP diet – just placebo? Low versus high FODMAP diet in patients with irritable bowel syndrome. (external link)
• Hoff, Dag Arne Lihaug; Krarup, Anne Lund; Lelic, Dina 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)
• Nilssen, Inge Berg; Gregersen, Hans; Ødegaard, Svein et al. (2010). In patients with functional chest pain, sensation elicited during oesophageal bag distension is mechanical rather than ischemic in origin. (external link)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (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)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (2008). Development of a multimodal device incorporating laser Doppler flowmetry to study oesophageal pain mechanisms. (external link)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (2008). Distension-induced pain in the esophagus correlates with wall stress and strain but not with mucosal perfusion in healthy volunteers.. (external link)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (2007). Distensjonsutløyst smerte i øsofagus hjå friske korrelerer med vegg-stress og -strain, men ikkje med mucosa perfusjon. (external link)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (2007). Pain mechanisms of the esophagus in healthy humans studied by laser Doppler flowmetry.. (external link)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (2006). Development of a multimodal device incorporating laser Doppler flowmetry to study oesophageal pain mechanisms. (external link)
• Katz, Phil O; Silman, Joel; Katzka, David et al. (1998). H.pylori infection increases nocturnal acid control on proton pump inhibitors. (external link)

Interview

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

Reader opinion piece

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

Lecture

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

Book review

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

Doctoral dissertation

• Jensen, Caroline; Hoff, Dag Arne Lihaug; Lied, Gülen Arslan et al. (2021). Supplementation with cod protein hydrolysate : Intervention studies in healthy adults and adults with metabolic syndrome. (external link)
• Dale, Hanna Fjeldheim; Lied, Gülen Arslan; Hatlebakk, Jan Gunnar 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)
• Hoff, Dag Arne Lihaug; Hatlebakk, Jan Gunnar (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)
• Hatlebakk, Jan Gunnar (1997). Diagnosis and treatment of uncomplicated reflux oesophagitis. (external link)

Errata

• Dale, Hanna Fjeldheim; Jensen, Caroline; Hausken, Trygve 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)

Editorial

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

Chapter

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

Academic monograph

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

Popular scientific article

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

Article in business/trade/industry journal

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

Academic chapter/article/Conference paper

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

Non-fiction book

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

Feature article

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

Encyclopedia article

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

See a complete overview of publications in Cristin.