[1] Univ Palermo, Gastroenterol Sect, Biomed Dept Internal & Specialized Med, Palermo, Italy
[2] Univ Parma, Unit Infect Dis & Hepatol, Teaching Hosp, Parma, Italy
[3] Ospedali Riuniti Villa Sofia Cervello, Div Internal Med 2, Palermo, Italy
[4] Belcolle Hosp, Div Gastroenterol, Viterbo, Italy
[5] Univ Bologna, Div Internal Med, Dept Med & Surg Sci, Alma Mater Studiorum, Bologna, Italy
[6] Univ Naples Federico II, Dept Med & Surg, Div Gastroenterol, Naples, Italy
[7] Univ Bologna, Dept Med & Surg Sci, Bologna, Italy
[8] Univ Padua, Dept Surg Oncol & Gastroenterol, Padua, Italy
[9] Univ Genoa, Gastroenterol Unit, Dept Internal Med, IRCCS Azienda Osped Univ San Martino IST, Genoa, Italy
[10] Univ Bologna, Alma Mater Studiorum, Dept Med & Surg Sci, Div Semeiot, Bologna, Italy
[11] Univ Milan, AM&A Migliavacca Ctr Liver Dis, Div Gastroenterol 1, Fdn IRCCS Ca Granda Maggiore Hosp, Milan, Italy