1. Division of Gastroenterology and Hepatology; Centre Hospitalier Universitaire Vaudois; University of Lausanne; Lausanne Switzerland
2. Department of Gastroenterology, Hepatopancreatology and Digestive Oncology; CUB Hôpital Erasme; Université Libre de Bruxelles; Brussels Belgium
3. Laboratory of Experimental Gastroenterology; Université Libre de Bruxelles; Brussels Belgium