[1] German Canc Res Ctr DKFZ Heidelberg, Div Pediat Neurooncol, D-69120 Heidelberg, Germany
[2] Univ Heidelberg Hosp, Dept Pediat Oncol Hematol & Immunol, D-69120 Heidelberg, Germany
[3] German Canc Res Ctr DKFZ Heidelberg, Div Mol Genet, D-69120 Heidelberg, Germany
[4] Univ Paris 11, Gustave Roussy Canc Inst, Dept Pediat & Adolescent Oncol, Brain Tumor Program, F-94805 Villejuif, France
[5] Duke Univ, Med Ctr, Div Pediat Hematol Oncol, Durham, NC 27710 USA
[6] Hosp Sick Children, Arthur & Sonia Labatt Brain Tumour Res Ctr, Toronto, ON M5G 1X8, Canada
[7] McGill Univ, Div Expt Med, Montreal, PQ H3H 2R9, Canada
[8] McGill Univ, Dept Human Genet, Montreal, PQ H3H 2R9, Canada
[9] McGill Univ, Ctr Hlth, Montreal, PQ H3H 2R9, Canada
[10] Inst Canc Res, Div Mol Pathol, Sutton SM2 5NG, Surrey, England
[11] Inst Canc Res, Div Canc Therapeut, Sutton SM2 5NG, Surrey, England
[12] Univ Calif San Francisco, Dept Neurosurg, Brain Tumor Res Ctr, San Francisco, CA 94143 USA
[13] Columbia Univ, Med Ctr, Inst Canc Genet, New York, NY 10032 USA
[14] Columbia Univ, Med Ctr, Dept Pathol, New York, NY 10032 USA
[15] Columbia Univ, Med Ctr, Dept Neurol, New York, NY 10032 USA
[16] Univ Texas MD Anderson Canc Ctr, Dept Neurooncol, Houston, TX 77030 USA
[17] Mem Sloan Kettering Canc Ctr, Brain Tumor Ctr, Human Oncol & Pathogenesis Program, New York, NY 10065 USA
[18] Mem Sloan Kettering Canc Ctr, Brain Tumor Ctr, Dept Neurosurg, New York, NY 10065 USA