[1] Inst Biomed Res, Frankfurt, Germany
[2] Univ Med Sch, Dept Hematol Oncol, Frankfurt, Germany
[3] Univ Heidelberg Hosp, Inst Human Genet, Heidelberg, Germany
[4] German Canc Res Ctr, Mol Epidemiol Grp, D-6900 Heidelberg, Germany
[5] Univ Womens Clin, Div Mol Biol Breast Canc, Heidelberg, Germany
[6] Natl Ctr Tumor Dis, Dept Translat Oncol, Heidelberg, Germany
[7] German Canc Res Ctr, Clin Cooperat Unit Mol Hematol Oncol, D-6900 Heidelberg, Germany
[8] Heidelberg Univ, Dept Internal Med 5, Heidelberg, Germany
[9] Hannover Med Sch, Dept Cell & Mol Pathol, D-3000 Hannover, Germany
[10] Charite, Dept Hematol Oncol & Transfus Med, Berlin, Germany
[11] Univ Dusseldorf, Inst Pathol, D-4000 Dusseldorf, Germany
[12] EUFETS AG, Idar Oberstein, Germany
[13] UCL Inst Child Hlth, Ctr Immunodeficiency, London, England
[14] Great Ormond St Hosp Sick Children, London WC1N 3JH, England
[15] Univ Childrens Hosp Zurich, Div Hematol Immunol, Zurich, Switzerland