Affiliation: | 1. 1st Medical Department, University of Tübingen, Germany;2. Department of General, Visceral, and Transplantation Surgery, University of Tübingen, Germany;3. Department of Medical Biometry, University of Tübingen, Tübingen, Germany;4. Department of Internal Medicine, Division of Gastroenterology and Endocrinology, University of Rostock, Ernst-Heydemann-Str. 6, 18057 Rostock, Germany |