[1] Semmelweis Univ, Dept Med 1, HU-1083 Budapest, Hungary
[2] Csolnoky F Prov Hosp, Dept Med 1, Veszprem, Hungary
[3] Univ Lorraine, Nancy Univ Hosp, Dept Hepato Gastroenterol, Vandoeuvre Les Nancy, France
[4] CHU Vaudois, Div Gastroenterol & Hepatol, CH-1011 Lausanne, Switzerland
[5] Triemli Municipal Hosp, Div Gastroenterol & Hepatol, Zurich, Switzerland
[6] Univ Zurich Hosp, Div Gastroenterol & Hepatol, CH-8091 Zurich, Switzerland