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.