1. Division of Gastroenterology and Hepatology; University Hospital Zurich; Zurich Switzerland
2. Department of Internal Medicine; Triemli Hospital; Zurich Switzerland
3. Department of Internal Medicine; University Hospital Zurich; Zurich Switzerland
4. NIHR Nottingham Digestive Diseases Biomedical Research Unit; Queen's Medical Centre; Nottingham UK
5. Zurich Centre for Integrated Human Physiology; Institute of Physiology; University of Zurich; Zürich Switzerland
6. Division of Gastroenterology and Hepatology; Triemli Hospital; Zurich Switzerland