[1] Triemli Hosp, Div Gastroenterol & Hepatol, Zurich, Switzerland
[2] Univ Zurich Hosp, Div Gastroenterol & Hepatol, CH-8091 Zurich, Switzerland
[3] Seespital Horgen, Div Gastroenterol & Hepatol, Horgen, Switzerland
[4] Med Univ Hosp Liestal, Div Gastroenterol & Hepatol, Liestal, Switzerland
[5] Univ Lausanne Hosp, Div Gastroenterol & Hepatol, Lausanne, Switzerland
[6] Univ Hosp Nancy Brabois, INSERM, U954, Vandoeuvre Les Nancy, France
[7] Univ Hosp Nancy Brabois, Dept HepatoGastroenterol, Vandoeuvre Les Nancy, France
[8] Clin Source Gastroenterol, Lausanne, Switzerland