[1] Univ Med Ctr Freiburg, Dept Pediat & Adolescent Med, Div Pediat Hematol & Oncol, Freiburg, Germany
[2] Univ Freiburg, Fac Biol, Freiburg, Germany
[3] Univ Freiburg, Spemann Grad Sch Biol & Med SGBM, Freiburg, Germany
[4] Univ Med Ctr Ulm, Dept Pediat & Adolescent Med, Ulm, Germany
[5] Univ Med Ctr Freiburg, Clin Internal Med 2, Freiburg, Germany
[6] German Canc Consortium DKTK, Heidelberg, Germany