1. Department of Clinical Medicin, Aalborg University, Aalborg, Denmark
2. Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
3. Department of Surgery, Städtisches Klinikum München Bogenhausen, Munich, Germany
4. Department of surgery, Sheba Medical Centre, Ramat Gan Israel and Sackler Medical School, Tel Aviv University, Israel
5. Department of gastroentrology, Sheba Medical Centre, Ramat Gan Israel and Sackler Medical School, Tel Aviv University, Israel
6. Department of Surgery, Aalborg University Hospital, Denmark
7. Division of General and HPB Surgery, Luigi Sacco Hospital, Milan, Italy
8. Department of Surgery, Università degli Studi di Milano, Milan, Italy
9. Department of Surgery, Azienda Ospedaliera Ospedali Riuniti Villa Sofia-Cervello, Palermo, Italy
10. Research Unit for Surgery and IBD-Care, Odense University Hospital, Odense, Denmark
11. Department of Gastroentrology, Herlev University Hospital, Herlev, Denmark
12. Department of Surgery, Portsmouth Hospitals NHS Trust, Portsmouth, UK
13. Department of Surgery, St Mark's and Northwick Park Hospital, UK
14. Department of 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, Denmark
17. Division of Colon and Rectal Surgery, Humanitas Clinical and Research Centre IRCCS, Humanitas University, Milan, Italy
18. Department of Biomedical Sciences, Humanitas University, Milan, Italy
19. Department of Surgery, University Hospital La Fe, University of Valencia, Spain
20. Department of Surgery, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic
21. Department of Gastroenterology and Internal Medicine, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic
22. Department of Surgery, Faculty of Medicine, Gazi University, Ankara, Turkey
23. Department of Surgery, Kocaeli University School of Medicine, Turkey
24. Department of Surgery, Hospital del Mar, Barcelona, Spain
25. Colorectal Surgery Unit, Hospital Universitario Son Espases, Mallorca, Spain
26. Department of Surgery, Universidad Francisco de Vitoria, Madrid, Spain
27. Department of Medicine, Universidad Francisco de Vitoria, Madrid, Spain