[1] Massachusetts Gen Hosp, Hematol Oncol Unit, Ctr Canc, Boston, MA 02114 USA
[2] Dana Farber Canc Inst, Adult Leukemia Program, Boston, MA 02115 USA
[3] Beth Israel Deaconess Med Ctr, Div Hematol Oncol, Boston, MA 02215 USA
[4] Millenium Pharmaceut Inc, Cambridge, MA USA