1. Department of Surgery, SSORG—Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Department of Surgery, Region Västra Götaland Sahlgrenska University Hospital/Östra Gothenburg Sweden
3. Department of Surgery, Institution for Clinical Sciences Malmö, Skåne University Hospital Malmö Lund University Malmö Sweden
4. Department of Surgical and Perioperative Sciences, Surgery Umeå University Umeå Sweden
5. Wallenberg Centre for Molecular Medicine Umeå University Umeå Sweden