1. Division of Gastroenterology, Mater Dei Hospital, Malta
2. Department of Internal Medicine, University of Ioannina School of Medical Sciences, Ioannina, Greece
3. Dipartimento di Medicina Interna e Specialita’ Mediche, University of Rome ‘Sapienza’, Italy
4. IBD Center, IRCCS Humanitas, Milan, Italy
5. Department of Gastroenterology, Evangelismos Hospital, Athens, Greece
6. Department of Gastroenterology, Hospital Universitario Ramón y Cajal, Madrid, Spain
7. Department of Gastroenterology, Sheba Medical Center, Tel Hashomer, Israel
8. Hospital Beatriz Ângelo, Gastroenterology Department, Loures, Portugal