Affiliation: | 1. Department of Internal Medicine III, Division of Gastroenterology and Hepatology, Medical University Vienna, Austria;3. Department of General Internal Medicine, Bern University Hospital, Bern, Switzerland;4. Department of Gastroenterology and Hepatology, Medical University Innsbruck, Austria;6. Division of Gastroenterology and Hepatology, Medical University Graz, Austria;5. Hospital Elisabethinen, Linz, Austria |