1. Department of Oncology, Clinical Cancer Research Center, Aalborg University Hospital, Aalborg;
2. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark;
3. Department of Surgery, Aarhus University Hospital, Aarhus, Denmark;
4. Gastrounit, Surgical Division, Hvidovre University Hospital, Copenhagen, Denmark;
5. Abdominal Disease Center K, Bispebjerg University Hospital, Copenhagen, Denmark;
6. Department of Oncology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark