[1] Univ Freiburg, Div Pediat Hematol & Oncol, Freiburg, Germany
[2] Freiburg Univ Hosp, Freiburg, Germany
[3] Univ Freiburg, Div Pediat Hematol & Oncol, Dept Pediat & Adolescent Med, Med Ctr,Fac Med, Freiburg, Germany
[4] Univ Freiburg, Fac Biol, Freiburg, Germany
[5] Univ Freiburg, Spemann Grad Sch Biol & Med, Freiburg, Germany
[6] Univ Freiburg, Div Pediat Hematol & Oncol, Dept Pediat & Adolescent Med, Med Ctr, Freiburg, Germany
[7] Univ Childrens Hosp Freiburg, Freiburg, Germany
[8] Univ Hosp Freiburg, Dept Pediat & Adolescent Med, Freiburg, Germany
[9] Univ Freiburg, Univ Hosp Freiburg, Dept Innere Med I, Freiburg, Germany
[10] German Canc Consortium DKTK, Heidelberg, Germany
[11] CPH Czech Working Grp Pediat Hematol, Prague, Czech Republic
[12] Charles Univ Prague, Fac Med 2, Dept Paediat Haematol & Oncol, Prague, Czech Republic
[13] Univ Hosp Motol, Prague, Czech Republic
[14] Hannover Med Sch, Inst Cell & Mol Pathol, Hannover, Germany
[15] Hannover Med Sch, Dept Human Genet, Hannover, Germany
[16] Univ Hosp Freiburg, Dept Pediat & Adolescent Med, Freiburg, Germany
[17] St Jude Childrens Res Hosp, 332 N Lauderdale St, Memphis, TN 38105 USA