1. IBD Unit, Presidio Columbus, Fondazione Policlinico Gemelli Università Cattolica, Rome, Italy
2. Humanitas Research Hospital and University, Gastroenterology and IBD Center, Rozzano, Italy
3. Centro Malattie retto-intestinali, Sacro Cuore Don Calabria Hospital, Negrar, Italy
4. AOU Careggi, Gastroenterology, Florence, Italy
5. University of Messina, Clinical Unit for Chronic Bowel Disorders, Messina, Italy
6. Riuniti Villa Sofia–Cervello Hospital, Internal Medicine 2, IBD Unit Palermo, Italy
7. Luigi Sacco University Hospital, Gastroenterology and IBD Unit, Milan, Italy
8. IRCCS-CSS Hospital, Gastroenterology, San Giovanni Rotondo, Italy
9. Gastroenterology and Hepatology Section, DiBiMis, University of Palermo, Palermo, Italy
10. University of Rome Tor Vergata, Department of Systems Medicine, Gastroenterology, Roma
11. S. Camillo-Forlanini Hospital, Gastroenterology, Rome, Italy
12. AOUP, Gastroenterology, Pisa, Italy
13. University of Padova, Gastroenterology, Padova, Italy
14. Meyer Children’s Hospital, Gastroenterology and Nutrition, Florence, Italy
15. University of Bari, Gastroenterology, Bari, Italy
16. Federico II University, Gastroenterology, Naples, Italy
17. IRCCS Policlinico, Gastroenterology, San Donato Milanese–Milano, Italy
18. First Department of Medicine, S. Matteo Hospital Foundation, University of Pavia, Pavia, Italy
19. University Hospital, Gastroenterology, Modena, Italy
20. U.O.C. Gastroenterologia ed Endoscopia Digestiva ASST Ovest Milanese, Legnano, Italy
21. SC Gastroenterology ASST Settelaghi Varese, Italy
22. ASST Rhodense, Rho Hospital, Gastroenterology Unit, Rho, Italy
23. Ospedale Valduce, Gastroenterology, Como, Italy
24. Department of Biochemical and Clinical Science “L. Sacco” ASST Fatebenefratelli Sacco–University of Milan, Italy
25. AOU Maggiore, Gastroenterology, Novara, Italy
26. Istituto Fondazione Poliambulanza Hospital, Department of Medicine, Gastroenterology and Digestive Endoscopy, Brescia, Italy
27. S. Giuseppe Hospital, Gastroenterology, Milano, Italy
28. S. Pellegrino Hospital, Gastroenterology, Trani, Italy
29. IRCCS AOU San Martino IST Gastroenterology Genova, Italy
30. AO Hospital, Internal Medicine, Lecco, Italy
31. Gastroenterology and Endoscopy Unit, IRCCS Ca’ Granda Ospedale Maggiore Foundation, Milan, Itay