1. Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
2. University of Basel, Basel, Switzerland
3. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
4. IBD Center, Humanitas Clinical and Research Center, Milan, Italy
5. Department of Gastroenterology, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
6. Humanitas Clinical and Research Center, Division of Colon and Rectal Surgery, Humanitas University, Department of Biomedical Sciences, Milan, Italy
7. Imperial College London, Department of Surgery and Cancer, St Mark’s Hospital, Department of Gastroenterology, London, UK
8. IBD Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS - Universita’ Cattolica del Sacro Cuore, Rome, Italy
9. Department of Internal Medicine I, Siloah St Trudpert Hospital, Pforzheim, Germany
10. Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
11. Department of Systems Medicine, University ‘Tor Vergata’ of Rome, Rome, Italy
12. Gastroenterology Practice Minden, Minden, Germany
13. Imelda GI Clinical Research Centre, Imelda General Hospital, Bonheiden, Belgium
14. Gastrounit, Medical Division, Hvidovre Hospital, University of Copenhagen, Copenhagen, Denmark
15. Department of Gastroenterology, Royal Liverpool University Hospital, Liverpool, UK
16. Department of Gastroenterology and Centre for Colorectal Disease, St Vincent’s University Hospital, Dublin, Ireland
17. Department of Surgery, Aalborg University Hospital, Aalborg, Denmark
18. Department of Medicine, Division of Gastroenterology, Mater Dei Hospital, Msida, Malta
19. Department of Surgery, Hospital Zollikerberg, Zollikerberg Zürich, Switzerland
20. Visceral Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland; Department of Human Medicine, Faculty of Health, University of Witten/Herdecke, Witten, Germany
21. IBD Unit, DIMEC, University of Bologna, Bologna, Italy
22. Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa [IIS-IP], Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas [CIBEREHD], Madrid, Spain
23. IBD UNIT, Hospital Clíico Universitario ‘Lozano Blesa’, IIS Aragón, CIBEREHD, Zaragoza, Spain
24. Department of Gastroenterology, Barts Health NHS Trust, Royal London Hospital, London, UK
25. Fifth Department of Internal Medicine, Sub-department of Gastroenterology and Hepatology, University Hospital Bratislava and Faculty of Medicine, Comenius University Bratislava, Slovakia
26. Clinic for Visceral Surgery and Medicine, Inselspital, University Hospital of Bern, Bern, Switzerland
27. Department of Gastroenterology and Hepatology, University and Medical School of Ioannina, Ioannina, Greece
28. Department of Gastroenterology, Tel-HaShomer Sheba Medical Center, Ramat Gan, Israel; and Sackler Medical School, Tel Aviv, Israel
29. Department of Gastroenterology, Hepatology and Nutrition, Pauls Stradins Clinical University Hospital, Department of Internal Medicine, Riga Stradiņš University, Riga, Latvia
30. Department of Internal Medicine and Gastroenterology, Hospital Lüneburg, Lüneburg, Germany
31. National Public Health Organization, Athens, Greece
32. Outpatients Department of Gastroenterology, Hospital Lüneburg, Lüneburg, Germany
33. Department of Pharmacology and Therapeutics; Institute for Molecular and Cell Biology, University of Porto, Faculty of Medicine, Porto, Portugal
34. Department of Medicine [Division of Gastroenterology] and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada
35. Department of Surgery, and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
36. Department of Advanced Medical and Surgical Sciences, Universitá degli Studi della Campania ‘Luigi Vanvitelli’, Naples, Italy
37. Department of Gastroenterology, IPOLFG, Lisbon, Portugal
38. Department of Gastroenterology and Hepatology, University Hospitals, KU Leuven, Leuven, Belgium
39. Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy
40. Department of General Surgery, Maastricht University Medical Centre+, Maastricht, The Netherlands
41. Department of Gastroenterology, Hospital Beatriz Ângelo, Loures, Portugal
42. Department of Gastroenterology, IBD unit, Beaujon Hospital, APHP, Clichy, France
43. Division of Gastroenterology and Hepatology, University Hospital, Zürich, Switzerland
44. Department of Gastroenterology and Hepatology, University Hospitals Leuven, KU Leuven, Leuven, Belgium, and Department of Chronic Diseases, Metabolism and Ageing, TARGID - IBD, KU Leuven, Leuven, Belgium
45. Department of Surgery, Shamir Medical Center [Assaf Harofe], Tel Aviv, Israel