[1] Univ Canc Ctr Frankfurt, Inst Klin Onkol Forsch, Frankfurt, Germany
[2] Univ Canc Ctr Frankfurt, Inst Klin Krebsforschung IKF GmbH Krankenhaus Nor, Frankfurt, Germany
[3] Univ Regensburg, Dept Gen & Visceral Surg, Hosp Barmherzige Brueder, Regensburg, Germany
[4] Tech Univ Muenchen, Dept Internal Med Hematol Med Oncol 3, Klinikum Rechts Isar, Munich, Germany
[5] Univ Canc Ctr Frankfurt, Inst KlinischOnkol Forsch Krankenhaus Nordwest, Frankfurt, Germany
[6] Inst Klin Krebsforschung IKF GmbH Krankenhaus Nor, Frankfurt, Germany
[7] Inst Clin Canc Res IKF GmbH, Krankenhaus Nordwest, Frankfurt, Germany
[8] UCT Univ Canc Ctr, Inst Clin Canc Res, Krankenhaus Nordwest, Frankfurt, Germany
[9] Tech Univ Munchen, Klin & Poliklinik Chirurg, Klinikum Rechts Isar, Munich, Germany
[10] Univ Hosp Frankfurt, Dept Gen & Visceral Surg, Frankfurt, Germany
[11] Univ Hosp Tuebingen, Dept Gen Visceral & Transplantat, Tubingen, Germany
[12] Univ Hosp Geneva, Geneva, Switzerland
[13] Charite Campus Mitte Univ Berlin, Berlin, Germany
[14] Klinikum Frankfurt Hochst, Dept Gen Visceral Vasc & Thorac Surg, Frankfurt, Germany