1. Division of Digestive Surgery and Urology, Department of Digestive Surgery, Turku University Hospital, University of Turku, Turku, Finland
2. Department of Surgery, University of Turku, Turku, Finland
3. Department of Public Health, University of Turku, Turku, Finland
4. Primary Health Care Unit, Hospital District of Southwest Finland, Turku, Finland
5. University of Namibia, Windhoek, Namibia
6. Department of Surgery, Mikkeli Central Hospital, Mikkeli, Finland
7. Department of Surgery, Oulu University Hospital, Oulu, Finland
8. Division of Surgery, Gastroenterology, and Oncology, Tampere University Hospital, Tampere, Finland
9. Department of Surgery, Jyväskylä Central Hospital, Jyväskylä, Finland
10. Department of Surgery, Kuopio University Hospital, Kuopio, Finland
11. Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
12. Department of Surgery, Seinäjoki Central Hospital, Seinäjoki, Finland
13. Department of Biostatistics, University of Turku, Turku, Finland
14. Department of Surgery, Central Hospital of Central Finland, Jyväskylä, Finland
15. Department of Sport and Health Sciences, Jyväskylä University, Jyväskylä, Finland
16. Department of Health and Medical Services, Päijät-Häme Joint Authority for Health and Wellbeing, Lahti, Finland
17. Department of Radiology, Turku University Hospital, Turku, Finland
18. Department of Radiology, Oulu University Hospital, Oulu, Finland