1. Department of Surgery, Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
2. Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway
3. Department of Clinical Medicine, University of Bergen, Bergen, Norway
4. Department of Surgery, University of Copenhagen, Rigshospitalet, Denmark
5. Department of Gastrointestinal Surgery, Meilahti Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
6. Division of Surgery, Department of Clinical Science, Intervention and Technology, Karolinska Institutet at Karolinska University Hospital, Stockholm, Sweden
7. Department of Hepato-Pancreato-Biliary Surgery, Oslo University Hospital, Oslo, Norway and Institute of Clinical Medicine, University of Oslo, Oslo, Norway
8. Department of Surgery, HPB Section, Aarhus University Hospital, Aarhus, Denmark
9. Division of Digestive Surgery and Urology, Turku University Hospital, Turku, Finland
10. Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
11. Department of Gastrointestinal Surgery, University Hospital of North Norway, Tromsø, Norway
12. Department of Surgery, Oulu University Hospital and Medical Research Center Oulu, Oulu, Finland
13. Department of Surgery in Linköping and Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden
14. Department of Surgery, Kuopio University Hospital, Kuopio, Finland
15. Department of Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden
16. Department of Acute and Digestive Surgery, Haukeland University Hospital, Bergen, Norway
17. Department of Gastroenterology and Alimentary Tract Surgery, Tampere University Hospital, Finland
18. Department of Diagnostics and Intervention, Surgery, Umeå University, Umeå, Sweden