[1] Univ Roma Tor Vergata, Dept Syst Med, Gastroenterol, Rome, Italy
[2] Complesso Integrato Columbus Catholic Univ, Internal Med & Gastroenterol, Complesso Integrato Columbus, Rome, Italy
[3] Azienda Osped S Camillo Forlanini, Gastroenterol Unit, Rome, Italy
[4] Univ Naples Federico II, Gastroenterol AOU, Naples, Italy
[5] Univ Padua, Dept Surg Oncol & Gastroenterol Sci, Padua, Italy
[6] Dept Surg Oncol & Gastroenterol Sci, Padua, Italy
[7] AO Mauriziano, Gastroenterol Unit, Turin, Italy
[8] S Filippo Neri Hosp, Gastroenterol, Rome, Italy
[9] Univ Milan Carita, IRCCS Ca Granda Osped Maggiore Policlin Fdn, Gastroenterol & Endoscopy Unit, Milan, Italy
[10] Univ Messina, Dept Clin & Expt Med, Clin Unit Chror Bowel Disorders, Messina, Italy
[11] Univ Campania Luigi Vanvitelli, UO Gastroenterol CS, Naples, Italy
[12] Osped Maggiore Bologna, Pediat, Bologna, Italy
[13] Hosp Civ, Gastroenterol, Palermo, Italy
[14] AOU Careggi Univ Hosp, Florence, Italy
[15] Hosp Riuniti Villa Sofia Cervello, Palermo, Italy
[16] SOFAR Osped San Giuseppe, Milan, Italy