1. Department of Surgical Gastroenterology, Center for Surgical Research, Hvidovre Hospital, Hvidovre, Denmark;
2. Digestive Disease Center, Bispebjerg Hospital, Copenhagen, Denmark;
3. Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark;
4. Department of Surgical Gastroenterology, Herlev Hospital, Herlev, Denmark;
5. Department of Surgery, Randers Hospital, Randers, Denmark;
6. Abbott Diagnostics Division R&D, Chicago, IL, USA;
7. Department of Oncology, Herlev and Gentofte Hospital, Herlev, Denmark;
8. Department of Medicine, Herlev and Gentofte Hospital, Herlev, Denmark