1. Department of Health Sciences and Technology; ETH Zürich; Otto-Stern-Weg 7 8093 Zürich Switzerland
2. Institute of Molecular Health Sciences; ETH Zürich; Otto-Stern-Weg 7 8093 Zürich Switzerland
3. Division of Endocrinology; Diabetes and Clinical Nutrition; University Hospital; Zurich 8091 Switzerland
4. Department of Gastroenterology and Hepatology; University Hospital Zurich; University of Zurich; Zurich 8091 Switzerland
5. Department of Biomedicine; University Hospital Basel; University of Basel; Basel CH-4031 Switzerland
6. Division of Gastroenterology and Hepatology; University Hospital Basel; Basel CH-4031 Switzerland
7. Charles River Research Services Germany GmbH; Am Flughafen 12 79108 Freiburg im Breisgau Germany