1. Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Hoppe-Seylerstrasse 3, 72076 Tübingen, Germany
2. Department of Oncology II, University Hospital Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany
3. Department of Urology, University Hospital Tübingen, Hoppe-Seylerstrasse 3, 72076 Tübingen, Germany