[1] Villa Sofia Cervello Hosp, Inflammatory Bowel Dis Unit, Palermo, Italy
[2] Univ Palermo, Gastroenterol & Hepatol Sect, Promise, Palermo, Italy
[3] Cannizzaro Hosp, Inflammatory Bowel Dis Unit, Catania, Italy
[4] Vittorio Emanuele Hosp, Gastroenterol Unit, Catania, Italy
[5] Guzzardi Hosp, Gastroenterol Unit, Vittoria, Italy
[6] G Martino Hosp, Inflammatory Bowel Dis Unit, Messina, Italy
[7] ARNAS Civ Cristina Benfratelli Hosp, Gastroenterol & Endoscopy Unit, Palermo, Italy
[8] S Elia Raimondi Hosp, Gastroenterol & Endoscopy Unit, Caltanissetta, Italy