[1] Arud Ctr Addict Med, Zurich, Switzerland
[2] Univ Hosp Geneva, Div Gastroenterol, Geneva, Switzerland
[3] Univ Hosp Geneva, Div Hepatol, Geneva, Switzerland
[4] Univ Hosp Geneva, Div Clin Pathol, Geneva, Switzerland
[5] GastroCentro, Lugano, Switzerland
[6] CDA, Louisville, CO USA
[7] WHO, Denges, Switzerland
[8] Univ Hosp Zurich USZ, Swiss HPB Hepatopancreatobiliary Ctr, Zurich, Switzerland
[9] Univ Hosp Zurich USZ, Dept Gastroenterol & Hepatol, Zurich, Switzerland
[10] Kantonsspital St Gallen, Div Gastroenterol & Hepatol, St Gallen, Switzerland