[1] Univ Lausanne, Ctr Hosp Univ Vaudois, Lausanne, Switzerland
[2] Univ Frankfurt Klinikum, Med Klin 1, D-6000 Frankfurt, Germany
[3] Osped Moncucco Lugano, Lugano, Switzerland
[4] Univ Bern, Bern, Switzerland
[5] Kantonsspital St Gallen, St Gallen, Switzerland
[6] Univ Basel, Basel, Switzerland
[7] Hop Neuchatelois, Neuchatel, Switzerland
[8] Univ Spital Zurich, Div Gastroenterol & Hepatol, Zurich, Switzerland
[9] Univ Geneva, Geneva, Switzerland
[10] Univ Klinikum Leipzig, Sekt Hepatol, Klin Gastroenterol & Rheumatol, Leipzig, Germany