1. Department of Clinical Medicine, University of Bergen, Norway
2. Department of Radiology, DCCG South Vejle Hospital, Vejle, Denmark
3. Department of Gastrointestinal Surgery, Cheltenham General Hospital, Cheltenham, UK
4. Department of Surgery, Haukeland University Hospital, Bergen, Norway
5. Department of Pathology, Haukeland University Hospital, Bergen, Norway
6. Department of Surgery A, OUH Svendborg Hospital, Svendborg, Denmark
7. Department of Surgery, Bispebjerg University Hospital, Copenhagen, Denmark
8. Department of Global Public Health and Primary Care, University of Bergen, Norway