[1] Tech Univ Munich, Klinikum Rechts Isar, Childrens Canc Res Ctr, Munich, Germany
[2] Ludwig Maximilians Univ Munchen, Inst Pathol, Munich, Germany
[3] Tech Univ Munich, Klinikum Rechts Isar, Dept Med 3, Hematol & Oncol, Munich, Germany
[4] Tech Univ Munich, Klinikum Rechts Isar, Inst Mol Immunol Expt Oncol, Munich, Germany
[5] Humboldt Univ, Max Delbruck Ctr Mol Med, Berlin, Germany
[6] Tech Univ Munich, Inst Virol, Munich, Germany
[7] Tech Univ Munich, Klinikum Rechts Isar, Inst Med Microbiol Immunol & Hyg, Munich, Germany