1. Sheba Medical Center, Department of Gastroenterology, Tel Hashomer, Ramat Gan 5262100, Israel
2. Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 52621, Israel
3. Tel Aviv Medical Center, Department of Gastroenterology and Liver Diseases, Tel-Aviv 6423906, Israel
4. Rabin Medical Center, Division of Gastroenterology, Department of Gastroenterology, Petah Tikva 49100, Israel
5. IBD Unit, Department of Gastroenterology, Ghent University Hospital, 9000 Ghent, Belgium
6. Division of Gastroenterology and Hepatology, University Hospital, CH-8048 Zurich, Switzerland
7. General Hospital Celje, 3000 Celje, Slovenia
8. IBD Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
9. Division of Gastroenterology, Department of Surgery, Oncology and Gastroenterology, University of Padua, 35128 Padua, Italy
10. Abraham and Sonia Rochlin IBD Unit, Department of Gastroenterology, Emek Medical Center, Afula 1834111, Israel
11. Rappaport Faculty of Medicine Technion, Israel Institute of Technology, Haifa 3200003, Israel
12. Department of Gastroenterology, University Medical Centre Ljubljana, 1231 Ljubljana, Slovenia
13. Medical Faculty, University of Ljubljana, 1231 Ljubljana, Slovenia
14. Service de Gastrologie-Entérologie-Hépatologie, CHU de Saint-Etienne, 42270 Saint-Etienne, France
15. Shaare Zedek Medical Center, Digestive Diseases Institute, Jerusalem 9103102, Israel
16. Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9372212, Israel
17. IBD Center, IRCCS Humanitas Research Hospital, Rozzano, 35128 Milan, Italy
18. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy