Affiliation: | 1. GI Services, University College London Hospital, London, UK;2. National Bowel Research Centre & GI Physiology Unit, Queen Mary University of London, London, UK;3. Department of Gastroenterology and Hepatology, University Hospital Zürich, Zürich, Switzerland;4. Abdominal Center: Gastroenterology, St. 5. Claraspital, Basel, Switzerland |