[1] Univ Hosp Geneva, Div Gastroenterol & Hepatol, Serv Gastroenterol & Hepatol, CH-1205 Geneva, Switzerland
[2] Casa Sollievo Sofferemza Hosp, IRCCS, Div Gastroenterol, San Giovanni Rotondo, Italy
[3] Erasme Univ Hosp, Dept Gastroenterol, B-1070 Brussels, Belgium
[4] Erasme Univ Hosp, Dept Hepatopancreat, B-1070 Brussels, Belgium
[5] Univ Vita Salute San Raffaele, IRCCS San Raffaele Hosp, Div Gastroenterol & Gastrointestinal Endoscopy, Milan, Italy
[6] Mayo Med Ctr, Dept Med, Div Gastroenterol & Hepatol, Rochester, MN USA