1. Department of Gastrointestinal Surgery, Stavanger University Hospital , Stavanger , Norway
2. SAFER Surgery, Stavanger University Hospital , Stavanger , Norway
3. STING, Stavanger Trauma Investigation Group, Stavanger University Hospital , Stavanger , Norway
4. Department of Clinical Medicine, University of Bergen , Bergen , Norway
5. Section for Traumatology, Surgical Clinic, Stavanger University Hospital , Stavanger , Norway