[1] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Boston, MA 02115 USA
[2] Brigham & Womens Hosp, Howard Hughes Med Inst, Boston, MA 02115 USA
[3] Johns Hopkins Univ, Sch Med, Baltimore, MD 21231 USA
[4] Millennium Pharmaceut Inc, San Francisco, CA 94080 USA
[5] GSF Munich, Natl Res Ctr Environm & Hlth, Lab Leukemia Diagnost, Dept Internal Med 3, D-81377 Munich, Germany
[6] GSF Munich, Natl Res Ctr Environm & Hlth, CCG Acute Leukemias, D-81377 Munich, Germany
[7] Univ Massachusetts, Sch Med, Howard Hughes Med Inst, Worcester, MA 01655 USA
[8] Univ Massachusetts, Sch Med, Program Mol Med, Worcester, MA 01655 USA