2023

• Fossmark, Reidar; Dalsbø, Peter Lefstad; Rokseth, Kjell Morten; Hauso, Øyvind. (2023) Laser lithotripsy for the treatment of a giant fecalith obstructing a colorectal anastomosis. Endoscopy
  Vitenskapelig artikkel
• Folkestad, Oddry H; Hauso, Øyvind; Mjønes, Patricia Gjertrud; Fougner, Reidun; Wasmuth, Hans; Fossmark, Reidar. (2023) Survival Trends in Patients with Small Intestinal Neuroendocrine Tumours—A Cohort Study in Central Norway. Cancers
  Vitenskapelig artikkel

2021

• Folkestad, Oddry; Wasmuth, Hans; Mjønes, Patricia; Fougner, Reidun; Hauso, Øyvind; Fossmark, Reidar. (2021) Survival and disease recurrence in patients with duodenal neuroendocrine tumours—a single centre cohort. Cancers
  Vitenskapelig artikkel

2020

• Folkestad, Oddry H; Wasmuth, Hans; Mjønes, Patricia; Fougner, Reidun; Hauso, Øyvind; Fossmark, Reidar. (2020) Survival and disease recurrence in patients operated for small intestinal neuroendocrine tumors at a referral hospital. Surgial oncology
  Vitenskapelig artikkel

2016

• Zeinali, Fatemeh; Bakkelund, Karin Elvenes; Hauso, Øyvind; Loennechen, Jan Pål; Waldum, Helge. (2016) Assessment of radiofrequency ablation technique in development of aortic valve stenosis in rabbits. Scandinavian Journal of Laboratory Animal Science
  Vitenskapelig artikkel
• Waldum, Helge; Hauso, Øyvind; Brenna, Eiliv; Qvigstad, Gunnar; Fossmark, Reidar. (2016) Does long-term profound inhibition of gastric acid secretion increase the risk of ECL cell-derived tumors in man?. Scandinavian Journal of Gastroenterology
  Vitenskapelig oversiktsartikkel/review

2015

• Waldum, Helge; Hauso, Øyvind; Fossmark, Reidar. (2015) Letter: Proton pump inhibitors, hypergastrinaemia and the risk of gastric neoplasia. Alimentary Pharmacology and Therapeutics
  Leserinnlegg
• Hauso, Øyvind; Martinsen, Tom Christian; Waldum, Helge. (2015) 5-Aminosalicylic acid, a specific drug for ulcerative colitis. Scandinavian Journal of Gastroenterology
  Vitenskapelig oversiktsartikkel/review

2014

• Waldum, Helge; Hauso, Øyvind; Sørdal, Øystein Finset; Fossmark, Reidar. (2014) Gastrin May Mediate the Carcinogenic Effect of Helicobacter pylori Infection of the Stomach. Digestive Diseases and Sciences
  Vitenskapelig artikkel
• Waldum, Helge; Ringnes, Eva; Nordbø, Helene; Sørdal, Øystein Finset; Nordrum, Ivar Skjåk; Hauso, Øyvind. (2014) The normal neuroendocrine cells of the upper gastrointestinal tract lack E-cadherin. Scandinavian Journal of Gastroenterology
  Vitenskapelig artikkel
• Waldum, Helge; Hauso, Øyvind; Fossmark, Reidar. (2014) The regulation of gastric acid secretion - clinical perspectives. Acta Physiologica
  Vitenskapelig oversiktsartikkel/review
• Zeinali, Fatemeh; Hauso, Øyvind; Wiseth, Rune; Moufack, Marcel; Waldum, Helge. (2014) Venous plasma serotonin is not a proper biomarker for pulmonary arterial hypertension. Scandinavian Cardiovascular Journal
  Vitenskapelig artikkel

2013

• Zeinali, Fatemeh; Fossmark, Reidar; Hauso, Øyvind; Wiseth, Rune; Hjertner, Øyvind; Waldum, Helge. (2013) Serotonin in blood: Assessment of its origin by concomitant determination of beta-thromboglobulin (platelets) and chromogranin A (enterochromaffin cells). Scandinavian Journal of Clinical and Laboratory Investigation
  Vitenskapelig artikkel
• Waldum, Helge; Hauso, Øyvind. (2013) Gastric acid inhibitors may prevent/heal oxyntic lesions by reducing blood demand. Gut
  Leserinnlegg

2012

• Jianu, Constantin-Sergiu; Lange, Ove Juel; Viset, Trond; Qvigstad, Gunnar; Martinsen, Tom Christian; Fougner, Reidun Lyngvi. (2012) Gastric neuroendocrine carcinoma after long-term use of proton pump inhibitor. Scandinavian Journal of Gastroenterology
  Vitenskapelig artikkel
• Waldum, Helge; Sandvik, Arne Kristian; Hauso, Øyvind; Qvigstad, Gunnar; Fossmark, Reidar. (2012) Withdrawing PPI Therapy: Response to Metz et al. American Journal of Gastroenterology
  Leserinnlegg

2011

• Stunes, Astrid Kamilla; Reseland, Janne Elin; Hauso, Øyvind; Kidd, Mark; Tømmerås, Karin; Waldum, Helge. (2011) Adipocytes express a functional system for serotonin synthesis, reuptake and receptor activation. Diabetes, obesity and metabolism
  Vitenskapelig artikkel
• Jianu, Constantin-Sergiu; Fossmark, Reidar; Syversen, Unni; Hauso, Øyvind; Fykse, Vidar; Waldum, Helge. (2011) Five-year follow-up of patients treated for 1 year with octreotide long-acting release for enterochromaffin-like cell carcinoids. Scandinavian Journal of Gastroenterology
  Vitenskapelig artikkel
• Fossmark, Reidar; Qvigstad, Gunnar; Martinsen, Tom Christian; Hauso, Øyvind; Waldum, Helge. (2011) Animal models to study the role of long-term hypergastrinemia in gastric carcinogenesis. Journal of Biomedicine and Biotechnology
  Vitenskapelig oversiktsartikkel/review
• Gustafsson, Björn; Bakke, Ingunn; Hauso, Øyvind; Kidd, Mark; Modlin, Irvin M; Fossmark, Reidar. (2011) Parietal cell activation by arborization of ECL cell cytoplasmic projections is likely the mechanism for histamine induced secretion of hydrochloric acid. Scandinavian Journal of Gastroenterology
  Vitenskapelig artikkel

2010

• Bakkelund, Karin Elvenes; Waldum, Helge; Nordrum, Ivar Skjåk; Hauso, Øyvind; Fossmark, Reidar. (2010) Long-term gastric changes in achlorhydric H+/K+-ATPase beta subunit deficient mice. Scandinavian Journal of Gastroenterology
  Vitenskapelig artikkel
• Jianu, Constantin-Sergiu; Fossmark, Reidar; Syversen, Unni; Hauso, Øyvind; Waldum, Helge. (2010) A meal test improves the specificity of chromogranin A as a marker of neuroendocrine neoplasia. Tumour Biology
  Vitenskapelig artikkel
• Waldum, Helge; Hauso, Øyvind. (2010) PPI-induced hypergastrinaemia and Barrett's mucosa: the fog thickens. Gut
  Leserinnlegg
• Waldum, Helge; Martinsen, Tom Christian; Hauso, Øyvind; Qvigstad, Gunnar. (2010) Oral proton-pump inhibitors and step-down therapy for nonulcer dyspepsia: is this the right approach?. Therapeutic Advances in Gastroenterology
  Vitenskapelig artikkel
• Waldum, Helge L.; Hauso, Øyvind; Sandvik, AK. (2010) PPI-induced hypergastrinemia and Barrett's mucosa: the fog thickens. Gut
  Leserinnlegg

2009

• Kidd, Mark; hauso, Øyvind; Drozdov, Ignat; Gustafsson, Björn; Modlin, Irvin. (2009) Delineation of the Chemomechanosensory Regulation of Gastrin Secretion Using Pure Rodent G Cells. Gastroenterology
  Vitenskapelig artikkel
• Drozdov, I; Kidd, M; Nadler, B; Camp, RL; Mane, SM; Hauso, Øyvind. (2009) Predicting Neuroendocrine Tumor (Carcinoid) Neoplasia Using Gene Expression Profiling and Supervised Machine Learning. Cancer
  Vitenskapelig artikkel

2008

• Gustafsson, Bjørn; Hauso, Øyvind; Drozdov, I; Kidd, M; Modlin, IM. (2008) Carcinoid heart disease. International Journal of Cardiology
  Vitenskapelig oversiktsartikkel/review
• Hauso, Øyvind; Gustafsson, Bjorn; Kidd, Mark; Waldum, Helge; Drozdov, Ignat; Chan, Anthony. (2008) Neuroendocrine tumor epidemiology: contrasting Norway and North America. Cancer
  Vitenskapelig artikkel
• Gustafsson, Bjorn; Hauso, Øyvind; Kidd, Mark; Modlin, Irvin. (2008) Carcinoid Heart Disease.
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Hauso, Øyvind; Gustafsson, Bjørn; Nordrum, Ivar Skjåk; Waldum, Helge. (2008) The Effect of Terguride in Carbon Tetrachloride (CCL4)-Induced Liver Fibrosis in Rat. Experimental biology and medicine
  Vitenskapelig artikkel

2007

• Hauso, Øyvind; Gustafsson, Bjørn; Waldum, Helge. (2007) Long slender cytoplasmic extensions: A common feature of neuroendocrine cells?. Journal of Neuroendocrinology (JNE)
  Vitenskapelig artikkel
• Hauso, Øyvind; Gustafsson, Bjørn; Loennechen, Jan Pål; Stunes, Astrid Kamilla; Nordrum, Ivar Skjåk; Waldum, Helge. (2007) Long-term serotonin effects in the rat are prevented by terguride. Regulatory Peptides
  Vitenskapelig artikkel