Institution: | (1) Division of General, Visceral and Transplant Surgery, University Hospital Tuebingen, Hoppe-Seyler-Str. 3, 72076 Tuebingen, Germany;(2) Department of Surgery, Neuwerk Hospital Maria von den Aposteln, Moenchengladbach, Germany;(3) Department of Medical Biometry, University Hospital Tuebingen, Tuebingen, Germany |