1. Department of Systems Medicine, GI Unit, Università degli Studi di Roma “Tor Vergata”, Rome, Italy
2. IBD Unit, Presidio Columbus Fondazione Policlinico A. Gemelli IRCCS – Università Cattolica del Sacro Cuore, Rome, Italy
3. GI Unit, AO S. Camillo Forlanini, Rome, Italy
4. Università Federico II, Naples, Italy
5. IBD Unit, Gastroenterology, Azienda-Università of Padova, Padua, Italy
6. IBD Unit, “Villa Sofia-Cervello” Hospital, Palermo, Italy
7. IBD Unit, S. Filippo Neri Hospital, Rome, Italy
8. AO Ordine Mauriziano, SC Gastroenterologia, Turin, Italy
9. University of Milan, IRCCS Ca’ Granda, Ospedale Maggiore Policlinico Foundation, Milan, Italy
10. Università degli Studi della Campania Luigi Vanvitelli,” Napoli, Italy
11. IBD Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
12. GI Unit, AUSL Bologna, Bologna, Italy
13. GI Unit, San Giuseppe Hospital, Milan, Italy
14. GI and Endoscopy Unit, ARNAS Civico Di Cristina-Benfratelli, Palermo, Italy
15. AOU Careggi, Firenze, Italy
16. IRCCS Policlinico S. Donato, Milan, Italy