[1] Univ Med Ctr Schleswig Holstein, Dept Pediat, ALL BFM Study Grp, Kiel, Germany
[2] Univ Cologne, Univ Hosp Cologne, Fac Med, Ctr Mol Med Cologne, Cologne, Germany
[3] Univ Med Ctr Schleswig Holstein, Med Dept Hematol & Oncol 2, Kiel, Germany
[4] German Ctr Environm Hlth HMGU, Helmholtz Zentrum Munchen, Res Unit Apoptosis Hematopoiet Stem Cells, Munich, Germany
[5] Otto Von Guericke Univ, Dept Pediat, Magdeburg, Germany