1. Department of Gastroenterology, Barts Health NHS Trust, London, Centre for Immunobiology, Blizard Institute, Faculty of Medicine, Barts & The London Medical School, Queen Mary University of London , UK
2. Gastrounit, medical division, Hvidovre Hospital, University of Copenhagen, Copenhagen Center for Inflammatory Bowel Disease in Children, Adolescents and Adults, Hvidovre Hospital, University of Copenhagen , Denmark
3. Department of Medicine, Division of Gastroenterology, Mater Dei Hospital , Msida , Malta
4. Department of Gastroenterology, Venizeleio General Hospital , Heraklion , Greece
5. Department of Gastroenterology and Hepatology, Division of Internal Medicine, University and Medical School of Ioannina , Ioannina , Greece
6. Department of Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele and University Vita-Salute San Raffaele , Milan , Italy
7. GI Unit, 3rd Academic Department of Internal Medicine, National and Kapodistrian University of Athens, Sotiria Hospital , Athens , Greece
8. University Hospital Santiago De Compostela CHUS, Department of Gastroenterology – IBD Unit , Santiago De Compostela , Spain
9. School of Immunology and Microbiology, King’s College London, The Medical Eye Unit, Guy’s and St Thomas’ Hospital NHS Foundation Trust , London , UK
10. Division of Gastroenterology and Hepatology, GZO – Zurich Regional Health Center, Wetzikon, Division of Gastroenterology and Hepatology, University Hospital Lausanne – CHUV, Lausanne, Switzerland; Department of Gastroenterology and Hepatology, University Hospital Zurich , Zurich , Switzerland
11. Centre for Cell Biology and Cutaneous Research, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London; Department of Dermatology, Royal London Hospital, Barts Health NHS Trust , London , UK
12. Gastroenterology, Clinic for Visceral Surgery and Medicine, Bern University Hospital, Bern, Switzerland; Crohn and Colitis Center, Gastro-entérologie Beaulieu SA , Lausanne , Switzerland
13. Department of Internal Medicine and Pediatrics, Ghent University, Ghent; Department of Gastroenterology, Ghent University Hospital , Ghent , Belgium
14. Department of Rheumatology and Clinical Immunology, Campus Kerckhoff, Justus Liebig University Giessen , Bad Nauheim , Germany
15. Cambridge University Hospitals NHS Foundation Trust , Cambridge , UK
16. Vall d’Hebron University Hospital, Universitat Autonoma de Barcelona UAB, Barcelona, Spain; Department of Advanced Medical and Surgical Sciences, Università degli Studi della Campania ‘Luigi Vanvitelli’ , Naples , Italy
17. Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy; Gastroenterology Unit, Azienda Ospedale Università di Padova , Padua , Italy
18. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Martin Zeitz Center for Rare Diseases, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Hamburg Center for Translational Immunology (HCTI), University Medical Center Hamburg-Eppendorf , Hamburg , Germany
19. Gastroenterology Division and IBD Center, Internal Medicine Department, Azienda Unità Sanitaria Locale – IRCCS , 42122 Reggio Emilia , Italy
20. Interdisciplinary Crohn Colitis Centre Rhein-Main, Frankfurt/Main, Department of Gastroenterology and Clinical Nutrition, DGD Clinics Sachsenhausen , Frankfurt/Main , Germany
21. Department of Gastroenterology, Hôpital Henri Mondor, APHP , Créteil , France
22. Department of Paediatric Gastroenterology, University of Groningen, University Medical Centre Groningen , Groningen , The Netherlands
23. Department of Gastroenterology and Hepatology, University Hospital , Zurich , Switzerland
24. Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan , Milan , Italy
25. Vascular Medicine Division and French Referral Center for Rare Auto-Immune Diseases, Université de Lorraine, INSERM, DCAC and CHRU-Nancy , Nancy , France
26. Department of Gastroenterology, Lüneburg Hospital, University of Münster , Lüneburg , Germany