[1] Georg Speyer Haus, Inst Biomed Res, Frankfurt, Germany
[2] Univ Med Sch, Dept Hematol Oncol, Frankfurt, Germany
[3] Univ Heidelberg, Inst Human Genet, Heidelberg, Germany
[4] German Canc Res Ctr, Mol Epidemiol Grp, D-6900 Heidelberg, Germany
[5] Natl Ctr Tumor Dis, Dept Translat Oncol, Heidelberg, Germany
[6] Univ Med Sch, Frankfurt, Germany
[7] Hannover Med Sch, Dept Cell & Mol Pathol, D-3000 Hannover, Germany
[8] Charite, Dept Hematol Oncol & Transfus Med, Berlin, Germany
[9] EUFETS AG, Idar Oberstein, Germany
[10] Great Ormond St Hosp Sick Children, London, England
[11] Univ Childrens Hosp Zurich, Div Hematol Immunol, Zurich, Switzerland