1. Department of Biosystems Science and Engineering; ETH Zurich; Basel Switzerland
2. Swiss Institute of Bioinformatics (SIB); Lausanne Switzerland
3. Division of Gastroenterology; University Hospital Zurich (USZ) and Zurich University; Zurich Switzerland
4. Department of Gastroenterology and Hepatology; University Medical Center Groningen; Groningen The Netherlands
5. Division of Pneumology; University Hospital Zurich (USZ) and Zurich University; Zurich Switzerland
6. Hohenegg Hospital; Meilen Switzerland
7. Division of Visceral Surgery; University Hospital Zurich (USZ); Zurich Switzerland
8. Division of Gastroenterology; Triemli Hospital Zurich; Zürich Switzerland