[1] Mem Sloan Kettering Canc Ctr, New York, NY USA
[2] Mem Sloan Kettering Canc Ctr, Dept Biostat & Epidemiol, New York, NY USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Leukemia, Houston, TX 77030 USA
[4] Mem Sloan Kettering Canc Ctr, Leukemia Serv, New York, NY USA
[5] MD Anderson Canc Ctr, Houston, TX USA