[1] Univ Toronto, Hosp Sick Children, Dept Paediat, Div Haematol Oncol, Toronto, ON M5G 1X8, Canada
[2] Univ Toronto, Hosp Sick Children, Dept Canc & Blood, Toronto, ON M5G 1X8, Canada
[3] Univ Toronto, Hosp Sick Children, Dept Genet, Toronto, ON M5G 1X8, Canada
[4] St Jude Childrens Res Hosp, Dept Pathol, Memphis, TN 38105 USA
[5] St Jude Childrens Res Hosp, Dept Tumor Cell Biol, Memphis, TN 38105 USA
[6] St Jude Childrens Res Hosp, Dept Hematol Oncol, Memphis, TN 38105 USA
[7] St Jude Childrens Res Hosp, Hartwell Ctr Bioinformat & Biotechnol, Memphis, TN 38105 USA
[8] Univ Tennessee, Coll Med, Dept Pediat, Memphis, TN 38163 USA
[9] Univ London, Sch Pharm, Ctr Appl Mol Biol, London WC1N 1AX, England
[10] Saitama Canc Ctr Hosp, Dept Canc Chemotherapy, Ina, Saitama 3630806, Japan
[11] Univ Hong Kong, Queen Mary Hosp, Dept Paediat, Div Haematol, Hong Kong, Hong Kong, Peoples R China
[12] Univ Hong Kong, Queen Mary Hosp, Dept Pathol, Div Haematol, Hong Kong, Hong Kong, Peoples R China
[13] Univ Toronto, Dept Med Biophys, Toronto, ON M5S 1A8, Canada
[14] Univ Toronto, Dept Lab Med & Pathobiol, Toronto, ON M5S 1A8, Canada
[15] Univ Toronto, Dept Mol & Med Genet, Toronto, ON M5S 1A8, Canada