1 Department of Medical Oncology and Sarcoma Center, West German Cancer Center, University Hospital Essen, Essen, Germany.
2 German Cancer Consortium (DKTK), Partner Site University Hospital Essen, Essen, Germany.
3 Department of Visceral and Transplantation Surgery, University Hospital Essen, Essen, Germany.
4 Department of Pathology, University Hospital Essen, Essen, Germany.
5 Department of Medical Oncology and Sarcoma Center, West German Cancer Center, University Hospital Essen, Essen, Germany. sebastian.bauer@uk-essen.de.
6 German Cancer Consortium (DKTK), Partner Site University Hospital Essen, Essen, Germany. sebastian.bauer@uk-essen.de.