[1] UCT Univ Canc Ctr, Inst Clin Canc Res IKF, Krankenhaus Nordwest, Frankfurt, Germany
[2] UCT Univ Canc Ctr, Inst Klin Krebsforschung IKF GmbH Krankenhaus Nor, Inst Clin Canc Res IKF Krankenhaus Nordwest, Frankfurt, Germany
[3] Uni vers Regensburg, Hosp Barmherzige Brueder, Dept Gen & Visceral Surg, Regensburg, Germany
[4] Tech Univ Munich, Dept Internal Med Hematol Med Oncol 3, Klinikum Rechts Isar, Munich, Germany
[5] Inst Klin Krebsforschung IKF GmbH Krankenhaus Nor, IKF, Frankfurt, Germany
[6] Univ Regensburg, Hosp Barmherzige Brueder, Dept Hematol & Oncol, Regensburg, Germany
[7] Tech Univ Munich, Klin & Poliklin Chirurg, Klinikum Rechts Isar, Munich, Germany
[8] Univ Klinikum Frankfurt Johannes Wolfgang, Dept Gen & Visceral Surg, Johannes Wolfgang Goethe Inst, Frankfurt, Germany
[9] Univ Tubingen, Surg Oncol, Tubingen, Germany
[10] Hop Univ Geneve, Serv Chirurg Viscerale, Geneva, Switzerland
[11] Univ Charite, Dept Surg, Campus Virchow Klinikum, Berlin, Germany
[12] Klinikum Frankfurt Hochst, Clin Gen Visceral Vasc & Thorac Surg, Frankfurt, Germany