1. Gastroenterology unit, Patient Area Gastroenterology, Dermatovenereology and Rheumatology, Karolinska University Hospital, Stockholm, Sweden
2. Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
3. Centre for Immunobiology, Bart’s and The London Medical School, Queen Mary University of London, London, UK
4. Division of Gastroenterology and Hepatology, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
5. Department of Gastroenterology, Addenbrooke’s Hospital, Cambridge University Teaching Hospitals NHS Foundation Trust, Cambridge, UK
6. Department of Dermatology, Hospital de la Santa Creu i Sant Pau. Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
7. University Eye Clinic, Uveitis Center, Charité – Universitätsmedizin Berlin, Berlin, Germany
8. Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
9. Department of Gastroenterology, Leiden University Medical Center, Leiden, the Netherlands
10. Gastroenterologie am Bayerischen Platz, Berlin, Germany
11. Department of Medicine (Gastroenterology, Infectious Diseases, Rheumatology), Campus Benjamin Franklin, Charité - Universitätsmedizin Berlin, Berlin, Germany
12. Division of Gastroenterology, Department of Internal Medicine, Medical School, University of Ioannina School of Medical Sciences, Ioannina, Greece
13. IBD Department, The Loginov Moscow Clinical Scientific Centre, Moscow, Russia
14. Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
15. Gastroenterology Research Unit, Mayo Clinic, Rochester, MN, USA
16. IBD Unit, Gastroenterology and Hepatology Department, Puerta de Hierro University Hospital, Majadahonda, Madrid, Spain
17. Department of Rheumatology, Leiden University Medical Center [LUMC], Leiden, Netherlands
18. Department of Medicine, Division of Gastroenterology, Mater Dei Hospital, Msida, Malta
19. Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
20. Abdominal Center K, Medical Section, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
21. Department of Medicine B, Gastroenterology and Hepatology, University Hospital Münster, Münster, Germany
22. Department of Ophthalmology, Triemli Hospital, Zurich, Switzerland & Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany
23. National and Kapodistrian University of Athens, GI Unit, 3rd Academic Department of Internal Medicine, Sotiria Hospital, Athens, Greece
24. Department of Gastroenterology, Hepatology and Nutrition; Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, OH, USA