[1] Villa Sofia Cervello Hosp, Div Internal Med, Palermo, Italy
[2] AOU Policlin G Martino, Inflammatory Bowel Dis Unit, Messina, Italy
[3] AOU Policlin G Giaccone, Gastroenterol & Hepatol Unit, Palermo, Italy
[4] ARNAS Garibaldi, Gastroenterol Unit, Catania, Italy
[5] AOU Policlin Vittorio Emanuele, Internal Med Unit, Catania, Italy
[6] AOU Policlin Vittorio Emanuele, Gastroenterol Unit, Catania, Italy
[7] ARNAS Civ Cristina Benfratelli, Gastroenterol & Endoscopy Unit, Palermo, Italy
[8] AO Guzzardi, Gastroenterol Unit, Vittoria, Italy
[9] AOOR S Elia M Raimondi, Gastroenterol Unit, Caltanissetta, Italy
[10] AO Santa Marta & S Venera, Gastroenterol Unit, Acireale, Italy
[11] AO Umberto I, Surg Unit, Siracusa, Italy
[12] AO Giovanni Paolo II, Internal Med Unit, Sciacca, Italy
[13] AO S Antonio Abate, Gastroenterol & Endoscopy Unit, Trapani, Italy
[14] AOOR Papardo Piemonte, Gastroenterol Unit, Messina, Italy
[15] AO Buccheri La Ferla Fatebenefratelli, Gastroenterol & Endoscopy Unit, Palermo, Italy
[16] AOU Policlin G Martino, Genet & Pediat Immunol Unit, Messina, Italy
[17] AOU Policlin G Martino, Pediat Gastroenterol Unit, Messina, Italy
[18] AOOR Villa Sofia Cervello, Pediat Unit, Palermo, Italy
[19] AOU Policlin G Giaccone, Pediat Unit, Palermo, Italy
[20] AO Cannizzaro, Gastroenterol Unit, Catania, Italy