[1] CHU Vaudois, Div Gastroenterol & Hepatol, Rue Bugnon 46, CH-1011 Lausanne, Switzerland
[2] Univ Lausanne, Lausanne, Switzerland
[3] Triemli Municipal Hosp, Div Gastroenterol & Hepatol, Zurich, Switzerland
[4] Univ Zurich Hosp, Div Gastroenterol & Hepatol, Zurich, Switzerland
[5] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[6] CHU Vaudois, Inst Social & Prevent Med, Lausanne, Switzerland
[7] Univ Basel Hosp, Div Gastroenterol & Hepatol, Basel, Switzerland
[8] CHU Vaudois, Div Pediat Gastroenterol & Nutr, Lausanne, Switzerland
[9] Univ Childrens Hosp Zurich, Div Gastroenterol & Nutr, Zurich, Switzerland
[10] Univ Childrens Hosp Zurich, Childrens Res Ctr, Zurich, Switzerland