1. Imperial College London, and Chelsea and Westminster Hospital, London, UK
2. Department of Gastroenterology and Hepatology, Chaim Sheba Medical Center, Tel Hashomer, Israel
3. Department of Medicine B, University Hospital Münster, Münster, Germany
4. Department of Gastroenterology, Venizeleio General Hospital, Heraklion, Crete, Greece
5. Department of Gastroenterology and Hepatology, University and Medical School of Ioannina, Ioannina, Greece
6. Department of Gastroenterology, Tel-Hashomer Sheba Medical Center, and Sackler School of Medicine, Tel Aviv University, Israel
7. Department of Internal Medicine and Gastroenterology, Hospital Lüneburg, Lüneburg, Germany
8. First Department of Medicine, University of Szeged, Szeged, Hungary
9. Department of Medicine, University of Cambridge, Cambridge, UK
10. IBD Unit, Hull & East Yorkshire NHS Trust, Hull, UK
11. Gastroenterology Department, Algarve Hospital Center; Biomedical Sciences & Medicine Department, University of Algarve, Faro, Portugal
12. Department of Medicine I, Agaplesion Markus Hospital, Frankfurt/Main, Germany
13. Department of Gastroenterology, CHU Bicêtre, Université Paris Sud, Paris, France