1. Division of Gastroenterology and Hepatology, Centre Hospitalier Universitaire Vaudois [CHUV] and University of Lausanne, Lausanne, Switzerland
2. Division of Paediatric Gastroenterology, Centre Hospitalier Universitaire Vaudois [CHUV] and University of Lausanne, Lausanne, Switzerland
3. Institute of Social and Preventive Medicine [IUMSP], Lausanne University Hospital, Lausanne, Switzerland
4. Division of Paediatric Gastroenterology, Children’s Hospital LUKS, Lucerne, Switzerland
5. Division of Gastroenterology, University Children’s Hospital of Bern, Bern, Switzerland
6. Center for Gastroenterology and Hepatology, Zurich, Switzerland
7. Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
8. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
9. Division of Gastroenterology and Nutrition, University Children’s Hospital Zurich, Zurich, Switzerland