1. HUNT Research Centre, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, Levanger, Norway
2. Department of Medicine, Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway
3. Upper Gastrointestinal Surgery, Department of Molecular Medicine and Surgery, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
4. Department of Gastrointestinal Surgery, St. Olav’s Hospital, Trondheim University Hospital, Trondheim, Norway
5. Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
6. Department of Pathology, St. Olav’s Hospital, Trondheim University Hospital, Trondheim, Norway
7. School of Cancer and Pharmaceutical Sciences, King’s College London, London, UK
8. Department of Gastroenterology and Hepatology, St. Olav’s Hospital, Trondheim University Hospital, Trondheim, Norway