Academic article

• Brekka, Anne Kristine; Vollsæter, Maria; Fretheim-Kelly, Zoe et al. (2025). Exploring upper airway and laryngeal resistance to noninvasive ventilation in healthy awake adults. (external link)
• Vreim, Kristine; Karlsen, Tom; Carlsen, Petter et al. (2025). Speech therapy for exercise-induced laryngeal obstruction. (external link)
• Andersen, Tiina Maarit; Brekka, Anne Kristine; Fretheim-Kelly, Zoe et al. (2025). Upper Airway and Translaryngeal Resistance During Mechanical Insufflation-Exsufflation. (external link)
• Karlsen, Tom Hemming; Vreim, Kristine; Røksund, Ola Drange et al. (2024). A speech therapy treatment protocol for exercise induced laryngeal obstruction. (external link)
• Jansrud, Ida; Halvorsen, Thomas; Vollsæter, Maria et al. (2022). Conundrums in the breathless athlete; exercise-induced laryngeal obstruction or asthma?. (external link)
• Fretheim-Kelly, Zoe; Engan, Mette; Clemm, Hege Synnøve Havstad et al. (2022). Reliability of translaryngeal airway resistance measurements during maximal exercise. (external link)
• Clemm, Hege Synnøve Havstad; Røksund, Ola Drange; Andersen, Tiina Maarit et al. (2022). Exercise-induced Laryngeal Obstruction: Protocol for a Randomized Controlled Treatment Trial. (external link)
• Sandnes, Astrid; Andersen, Tiina Maarit; Clemm, Hege Synnøve Havstad et al. (2021). Clinical responses following inspiratory muscle training in exercise-induced laryngeal obstruction. (external link)
• Setså, Erling Johan; Svendsen, Øyvind Sverre; Husby, Paul et al. (2020). An experimental study on intraoperative recovery of recurrent laryngeal nerve function. (external link)
• Fretheim-Kelly, Zoe; Halvorsen, Thomas; Heimdal, John-Helge et al. (2019). Feasibility and tolerability of measuring translaryngeal pressure during exercise. (external link)
• Sandnes, Astrid; Andersen, Tiina Maarit; Clemm, Hege Synnøve Havstad et al. (2019). Exercise-induced laryngeal obstruction in athletes treated with inspiratory muscle training. (external link)
• Sandnes, Astrid; Hilland, Magnus; Vollsæter, Maria et al. (2019). Severe exercise-induced laryngeal obstruction treated with supraglottoplasty. (external link)
• Andersen, Tiina Maarit; Halvorsen, Thomas; Fondenes, Ove et al. (2019). Larynx: The Complex Gateway to the Lungs. (external link)
• Sæther, Solbjørg Makalani Myrtveit; Heggestad, Torhild; Heimdal, John-Helge et al. (2019). Long Waiting Times for Elective Hospital Care – Breaking the Vicious Circle by Abandoning Prioritisation. (external link)
• Dahle, Geir Olav; Setså, Erling Johan; Svendsen, Øyvind Sverre et al. (2019). Vocal Cord Function During Recurrent Laryngeal Nerve Injury Assessed by Accelerometry and EMG. (external link)
• Clemm, Hege Synnøve Havstad; Sandnes, Astrid; Vollsæter, Maria et al. (2018). The Heterogeneity of Exercise-induced Laryngeal Obstruction.. (external link)
• Andersen, Tiina Maarit; Sandnes, Astrid; Fondenes, Ove et al. (2018). Laryngeal responses to mechanically assisted cough in progressing amyotrophic lateral sclerosis. (external link)
• Karlsen, Tom; Sandvik, Lorentz; Heimdal, John-Helge et al. (2018). Acoustic voice analysis and maximum phonation time in relation to voice handicap index score and larynx disease. (external link)
• Halvorsen, Thomas; Walsted, Emil Schwarz; Bucca, Caterina et al. (2017). Inducible laryngeal obstruction: An official joint European Respiratory Society and European Laryngological Society statement. (external link)
• Karlsen, Tom; Sandvik, Lorentz; Heimdal, John-Helge et al. (2017). Health-related Quality of Life as Studied by EORTC QLQ and Voice Handicap Index Among Various Patients With Laryngeal Disease. (external link)
• Røksund, Ola Drange; Heimdal, John-Helge; Clemm, Hege Synnøve Havstad et al. (2016). Exercise inducible laryngeal obstruction: diagnostics and management. (external link)
• Brauckhoff, Katrin; Vik, Renate Kollevåg; Sandvik, Lorentz et al. (2016). Impact of EMG changes in continuous vagal nerve monitoring in high-risk endocrine neck surgery. (external link)
• Andersen, Tiina Maarit; Sandnes, Astrid; Brekka, Anne Kristine et al. (2016). Laryngeal response patterns influence the efficacy of mechanical assisted cough in amyotrophic lateral sclerosis. (external link)
• Aarstad, Hans Jørgen; Aarstad, Helene Hersvik; Vintermyr, Olav Karsten et al. (2016). In vitro monocyte IL-6 secretion levels following stimulation with autologous spheroids derived from tumor or benign mucosa predict long-term survival in head and neck squamous cell carcinoma patients. (external link)
• Hilland, Magnus; Røksund, Ola Drange; Sandvik, Lorentz et al. (2016). Congenital laryngomalacia is related to exerciseinduced laryngeal obstruction in adolescence. (external link)
• Aarstad, Hans Jørgen; Vintermyr, Olav Karsten; Ulvestad, Elling et al. (2015). Peripheral blood monocyte and T-lymphocyte activation levels at diagnosis predict long-term survival in head and neck squamous cell carcinoma patients. (external link)
• Brauckhoff, Katrin; Vik, Renate Kollevåg; Sandvik, Lorentz et al. (2015). Impact of EMG Changes in Continuous Vagal Nerve Monitoring in High-Risk Endocrine Neck Surgery. (external link)
• Aarstad, Helene Hersvik; Vintermyr, Olav Karsten; Ulvestad, Elling et al. (2015). In vitro-stimulated IL-6 monocyte secretion and in vivo peripheral blood T lymphocyte activation uniquely predicted 15-year survival in patients with head and neck squamous cell carcinoma. (external link)
• Karlsen, Tom; Heimdal, John-Helge; Grieg, Anne Rita Helle et al. (2015). The Norwegian Voice Handicap Index (VHI-N) patient scores are dependent on voice-related disease group. (external link)
• Norlander, Katarina; Christensen, Pernille M.; Maat, Robert et al. (2015). Comparison between two assessment methods for exercise-induced laryngeal obstructions. (external link)
• Røksund, Ola Drange; Heimdal, John-Helge; Olofsson, Jan et al. (2014). Larynx during exercise: the unexplored bottleneck of the airways. (external link)
• Aaby, Camilla Sofie; Heimdal, John-Helge (2013). The voice-related quality of life (V-RQOL) measure-a study on validity and reliability of the Norwegian version. (external link)
• Karlsen, Tom; Grieg, Anne Rita Hella; Heimdal, John-Helge et al. (2013). Cross-cultural adaption and translation of the voice handicap index into Norwegian. (external link)
• Andersen, Tiina Maarit; Sandnes, Astrid; Hilland, Magnus et al. (2013). Laryngeal response patterns to mechanical insufflation-exsufflation in healthy subjects. (external link)
• Sandnes, Astrid; Andersen, Tiina Maarit; Hilland, Magnus et al. (2013). Laryngeal movements during inspiratory muscle training in healthy subjects. (external link)
• Karlsen, Tom; Grieg, Anne Rita Helle; Heimdal, John-Helge et al. (2012). Cross-cultural adaption and translation of the voice handicap index into Norwegian. (external link)
• Maat, Robert; Hilland, Magnus; Røksund, Ola Drange et al. (2011). Exercise-induced laryngeal obstruction: natural history and effect of surgical treatment. (external link)
• Røksund, Ola Drange; Havstad, Hege Synnøve; Heimdal, John-Helge et al. (2010). Left vocal cord paralysis after extreme preterm birth, a new clinical scenario in adults. (external link)
• Maat, Robert; Røksund, Ola Drange; Halvorsen, Thomas et al. (2009). Audiovisual assessment of exercise-induced laryngeal obstruction: reliability and validity of observations. (external link)
• Røksund, Ola Drange; Maat, Robert; Heimdal, John-Helge et al. (2009). Exercise induced dyspnea in the young. Larynx as the bottleneck of the airways. (external link)
• Heimdal, John-Helge; Kross, Kenneth Wilfried; Klementsen, Beate et al. (2008). Stimulated monocyte IL-6 secretion predicts survival of patients with head and neck squamous cell carcinoma. (external link)
• Kross, Kenneth Wilfried; Heimdal, John-Helge; Olsnes, Carla et al. (2008). Co-culture of head and neck squamous cell carcinoma spheroids with autologous monocytes predicts prognosis. (external link)
• Kross, Kenneth Wilfried; Heimdal, John-Helge; Olsnes, Carla et al. (2007). Tumour-associated macrophages secrete IL-6 and MCP-1 in head and neck squamous cell carcinoma tissue. (external link)
• Heimdal, John-Helge; Røksund, Ola Drange; Halvorsen, Thomas et al. (2007). Continuous Laryngoscopy Exercise Test: A Method for Visualizing Laryngeal Dysfunction During Exercise (Letter). (external link)
• Maat, Robert; Røksund, Ola Drange; Olofsson, Jan et al. (2007). Surgical treatment of exercise-induced laryngeal dysfunction. (external link)
• Heimdal, John-Helge; Røksund, Ola Drange; Halvorsen, Thomas et al. (2006). Continuous laryngoscopy exercise test: a method for visualizing laryngeal dysfunction during exercise. (external link)
• Aarstad, Hans Jørgen; Heimdal, John-Helge; Klementsen, Beate et al. (2006). Presence of activated T lymphocytes in peripheral blood of head and neck squamous cell carcinoma patients predicts impaired prognosis. (external link)
• Aarstad, Hans Jørgen; Heimdal, John-Helge; Olofsson, Jan et al. (2005). Mood, anxiety and sense of humor in head and neck cancer patients in relation to disease stage, prognosis and quality of life. (external link)
• Kross, Kenneth Wilfried; Heimdal, John-Helge; Olsnes, Carla et al. (2005). Head and neck squamous cell carcinoma spheroid- and monocyte spheroid-stimulated IL-6 and monocyte chemotactic protein-1 secretion are related to TNM stage, inflammatory state and tumor macrophage density. (external link)
• Olsnes, Carla; Heimdal, John-Helge; Kross, Kenneth Wilfried et al. (2005). Viable head and neck tumor spheroids stimulate in vitro autologous monocyte MCP-1 secretion through soluble substances and CD14/lectin-like receptors. (external link)

Poster

• Andersen, Tiina; Brekka, Anne Kristine; Fretheim-Kelly, Zoe et al. (2024). Upper airway and translaryngeal resistance during mechanical insufflation-exsufflation. (external link)
• Andersen, Tiina Maarit; Sandnes, Astrid; Brekka, Anne Kristine et al. (2015). Laryngeal response patterns to mechanical assisted cough in Amyotrophic Lateral Sclerosis.. (external link)
• Andersen, Tiina Maarit; Sandnes, Astrid; Brekka, Anne Kristine et al. (2015). Laryngeal response patterns to mechanical insufflation-exsufflation in amyotrophic lateral sclerosis.. (external link)
• Campos, Carolina; Røksund, Ola Drange; Vollsæter, Maria et al. (2014). Exercise induced inspiratory symptoms. (external link)
• Vollsæter, Maria; Clemm, Hege Synnøve Havstad; Heimdal, John-Helge et al. (2014). Spirometry- a tool for diagnosing exercise induced laryngeal obstruction (EILO)?. (external link)
• Clemm, Hege Synnøve Havstad; Vollsæter, Maria; Hilland, Magnus et al. (2014). Exercise induced laryngeal obstruction(EILO)diagnosed with laryngoscopy during rest or during exercise?. (external link)
• Vollsæter, Maria; Clemm, Hege Synnøve Havstad; Heimdal, John-Helge et al. (2014). Exercise Induced Inspiratory Stridor (EIIS) - A growing Challenge during Physical activity. (external link)
• Clemm, Hege Synnøve Havstad; Vollsæter, Maria; Røksund, Ola Drange et al. (2014). Exercise induced inspiratory stridor (EIIS) in athletes. (external link)

Doctoral dissertation

• Fretheim-Kelly, Zoe; Strand, Eric; Fintl, Constanze et al. (2021). From horses to humans : a comparative study developing the first protocol for measuring upper airway pressures in exercising humans. (external link)
• Andersen, Tiina Maarit; Røksund, Ola Drange; Halvorsen, Thomas et al. (2018). Laryngeal response patterns during mechanically assisted cough in Amyotrophic Lateral Sclerosis. (external link)
• Maat, Robert; Olofsson, Jan; Heimdal, John-Helge (2011). Exercise-induced laryngeal obstruction. Diagnostic procedures and therapy. (external link)

Academic literature review

• Fretheim-Kelly, Zoe Louise; Halvorsen, Thomas; Clemm, Hege Synnøve Havstad et al. (2019). Exercise induced laryngeal obstructions in humans and equines. A comparative review. (external link)
• Heimdal, John-Helge; Maat, Robert; Nordang, Leif (2018). Surgical intervention for exercise-induced laryngeal obstruction. (external link)
• Christensen, Pernille M.; Heimdal, John-Helge; Christopher, Kent L. et al. (2015). ERS/ELS/ACCP 2013 international consensus conference nomenclature on inducible laryngeal obstructions. (external link)
• Heimdal, John-Helge; Halvorsen, Thomas; Maat, Robert et al. (2011). Exercise Induced Laryngeal Obstruction (EILO): Diagnosis and Management. (external link)
• Kross, Kenneth Wilfried; Heimdal, John-Helge; Aarstad, Hans Jørgen (2010). Mononuclear phagocytes in head and neck squamous cell carcinoma. (external link)

Article in business/trade/industry journal

• Røksund, Ola Drange; Halvorsen, Thomas; Heimdal, John-Helge (2018). Heterogeniteten ved anstrengelsesutløst laryngeal obstruksjon. (external link)
• Røksund, Ola Drange; Heimdal, John-Helge; Halvorsen, Thomas (2016). Anstrengelsesutløst laryngeal obstruksjon - diagnostikk og behandling. (external link)

Reader opinion piece

• Andersen, Tiina Maarit; Sandnes, Astrid; Fondenes, Ove et al. (2018). Laryngoscopy Can Be a Valuable Tool for Unexpected Therapeutic Response in Noninvasive Respiratory Interventions.. (external link)
• Halvorsen, Thomas; Røksund, O.D.; Heimdal, John-Helge et al. (2011). Larynx in exercising humans; the unexplored bottleneck of the airways (Letter). (external link)
• Halvorsen, Thomas; Røksund, Ola Drange; Maat, Robert et al. (2011). Use of Post-Exercise Laryngoscopy to Evaluate Exercise Induced Dyspnea (Letter). (external link)

Academic lecture

• Heimdal, John-Helge; Hilland, Magnus (2013). Instructional Course " A method for visualising laryngeal obstruction during exercise". (external link)
• Heimdal, John-Helge (2012). Inducible Laryngeal obstructions. (external link)
• Heimdal, John-Helge (2012). Various faces of laryngeal spasm. (external link)
• Aarstad, Anne Kari Hersvik; Aarstad, Hans Jørgen; Heimdal, John-Helge et al. (2004). Personality and quality of life in relation to quantity of treatment in patients With HNSCC.. (external link)

See a complete overview of publications in Cristin.