Affiliation: | 1. Department of Medicine 1, Gastroenterology, Hepatology, Pneumology, Endocrinology, University Hospital Erlangen and Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Ulmenweg 18, 91054 Erlangen, Germany;2. Department of Gastroenterology and Hepatology, Universitäts Spital Zürich, Rämistrasse 100, 8091 Zürich, Switzerland |