[1] Hopp Childrens Canc Ctr Heidelberg KiTZ, Heidelberg, Germany
[2] German Canc Res Ctr, Div Translat Pediat Sarcoma Res B410, Neuenheimer Feld 280, D-69210 Heidelberg, Germany
[3] Hopp Childrens Canc Ctr KiTZ, Neuenheimer Feld 280, D-69210 Heidelberg, Germany
[4] Ludwig Maximilians Univ Munchen, Inst Pathol, Fac Med, Max Eder Res Grp Pediat Sarcoma Biol, Munich, Germany
[5] Univ Hosp Essen, West German Canc Ctr, Pediat 3, Essen, Germany
[6] German Canc Consortium DKTK, Partner Site Essen, Essen, Germany
[7] Heidelberg Univ Hosp, Dept Gen Visceral & Transplantat Surg, Heidelberg, Germany
[8] German Canc Consortium DKTK, Light Microscopy Facil, German Canc Res Ctr DKFZ, Heidelberg, Germany
[9] Univ Hosp Munster, Gerhard Domagk Inst Pathol, Div Translat Pathol, Munster, Germany
[10] Ludwig Maximilians Univ Munchen, Inst Pathol, Fac Med, Munich, Germany
[11] German Canc Consortium DKTK, Partner Site Munich, Munich, Germany
[12] Heidelberg Univ Hosp, Inst Pathol, Heidelberg, Germany