1. Department of Gastroenterology, North Zealand University Hospital, Frederikssund, Denmark
2. 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
3. Medizinische Klinik für Gastroenterologie, Infektiologie, Rheumatologie, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
4. Department of Medicine B, Gastroenterology and Hepatology, University Hospital Münster, Münster, Germany
5. Gastrounit, Medical section, Hvidovre University Hospital, Hvidovre, Denmark
6. Department of Human Genetics, KU Leuven, Leuven, Belgium
7. Department of Gastroenterology, Erasme University Hospital, ULB, Brussels, Belgium
8. Department of Gastroenterology, St. Vincent’s Hospital, Fitzroy, Australia
9. IBD Center, Department of Gastroenterology, Humanitas Research Hospital, Rozzano, Milanm, Italy
10. Department of Gastroenterology, Evangelismos Hospital, Athens, Greece
11. Department of Hepatology and Gastroenterology, Campus Charité Mitte, Charité - Universitätsmedizin Berlin, Berlin, Germany
12. Department of Gastroenterology, University Medical Centre Ljubljana, Ljubljana, Slovenia
13. Department of Gastroenterology and Hepatology, University Hospital Zvezdara, Belgrade, Serbia
14. Department of Gastroenterology, Hepatology and Nutrition, Pauls Stradins Clinical, University Hospital, Riga, Latvia
15. Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge, UK
16. Department of Gastroenterology, Tallaght University Hospital, Dublin, Irel
17. Department of Gastroenterology, Hospital de Galdakao, Galdakao, Spain
18. Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerl
19. Department of Medicine, Mater Dei Hospital, Tal-Qroqq, Malta
20. Department of Gastroenterology, IBD unit, Beaujon Hospital, APHP, Clichy, France
21. Department of Medicine, Gastroenterology division, Mount Sinai Hospital, New York, USA
22. Department of Colorectal Surgery, Royal Shrewsbury University Hospitals, Shrewsbury, UK
23. Department of Gastroenterology, University Hospitals Leuven, Leuven, Belgium
24. Gastroenheden D, Herlev and Gentofte University Hospital, Denmark