1. Department of General, Visceral and Transplantation Surgery, Hospital of the University of Munich, Ludwig-Maximilians-University (LMU), Munich, Bavaria, Germany
2. Department of General Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, P.R. China
3. Department of Surgery, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, Munich, Bavaria, Germany
4. German Cancer Consortium (DKTK), Partner Site Munich, Munich, Bavaria, Germany
5. Bavarian Cancer Research Center (BZKF), LMU Munich, Munich, Bavaria, Germany