1. Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
2. Department of Internal Medicine, Hospital Zollikerberg, Zollikerberg, Switzerland
3. Center for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, VD, Switzerland
4. Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, University Hospital Schleswig Holstein, Kiel, Germany
5. Department of Internal Medicine I, University Hospital Tübingen, Tübingen, Germany
6. Department of Gastroenterology and Hepatology, University Hospital Zurich, Rämistrasse 100, Zurich, 8091, Switzerland