1. OpenSourceResearch Collaboration , Aalborg , Denmark
2. Department of Gastroenterology, Herlev Hospital , Herlev , Denmark
3. Department of Surgery, Aalborg University , Aalborg , Denmark
4. Department of Surgery, Cedars-Sinai Medical Center , Los Angeles, California , USA
5. Department of Surgery, Städtisches Klinikum München Bogenhausen , Munich , Germany
6. Sheba Medical Center, Sackler Medical School Tel Aviv University , Ramat Gan , Israel
7. Department of Surgery, Aalborg University Hospital , Aalborg , Denmark
8. Division of General and HPB Surgery, Luigi Sacco Hospital , Milano , Italy
9. Surgery, Università degli Studi di Milano , Milan , Italy
10. Azienda Ospedaliera Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italy
11. Research Unit for Surgery and IBD-Care, Odense University Hospital, University of Southern Denmark , Odense , Denmark
12. Chelsea and Westminster Hospital NHS Foundation Trust , London , UK
13. Department of Surgery, St Mark’s and Northwick Park Hospital , London , UK
14. Colorectal Surgery, Vall d’Hebron University Hospital , Barcelona , Spain
15. Department of Advanced Medical and Surgical Sciences, Università degli Studi della Campania “Luigi Vanvitelli,” Naples , Italy
16. Department of Surgery, Hvidovre Hospital , Hvidovre , Denmark
17. Department of Biomedical Sciences, IRCCS Humanitas Research Hospital, Humanitas University , Milan , Italy
18. Department of Surgery, University Hospital La Fe, University of Valencia , Spain
19. Department of Surgery, Faculty of Medicine, University Hospital Brno, Masaryk University , Brno , Czech Republic
20. Department of Gastroenterology and Digestive Endoscopy, Masaryk Memorial Cancer Institute , Brno , Czech Republic
21. Department of Internal Medicine – Gastroenterology and Geriatrics, University Hospital Olomouc, Faculty of Medicine and Dentistry , Palacky University Olomouc, Olomouc , Czech Republic
22. Faculty of Medicine, Gazi University , Ankara , Turkey
23. Department of Surgery, Hospital del Mar , Spain
24. Medicine Faculty, Universidad Francisco de Vitoria , Madrid , Spain
25. Colorectal Surgery Unit, Hospital Universitario , Madrid Del Henares , Spain
26. Colorectal Surgery Unit, Hospital Universitario Son Espases , Mallorca , Spain
27. School of Medicine, Kocaeli University , Kocaeli , Turkey