[1] Amer Univ Beirut, Hemtol Oncol Div, Beirut, Lebanon
[2] MD Anderson Canc Ctr, Dept Leukemia, Houston, TX USA
[3] MD Anderson Canc Ctr, Houston, TX USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Leukemia, Houston, TX 77030 USA
[5] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[6] Univ Texas MD Anderson Canc Ctr, Dept Stem Cell Transplantat, Houston, TX 77030 USA