[1] City Hope Natl Med Ctr, Dept Populat Sci, Duarte, CA USA
[2] St Jude Childrens Res Hosp, Pediat Med Dept, 332 N Lauderdale St, Memphis, TN 38105 USA
[3] NHLBI, Cardiovasc & Pulm Branch, Bldg 10, Bethesda, MD 20892 USA
[4] Fred Hutchinson Canc Res Ctr, Clin Res & Publ Hlth Sci Div, 1124 Columbia St, Seattle, WA 98104 USA
[5] Dana Farber Canc Inst, Pediat Stem Cell Transplant Ctr, Boston, MA 02115 USA
[6] Mem Sloan Kettering Canc Ctr, Dept Med, 1275 York Ave, New York, NY 10021 USA
[7] Childrens Hosp Los Angeles, Childrens Ctr Canc & Blood Dis, Los Angeles, CA 90027 USA
[8] Univ Hosp Bern, Dept Hematol, Bern, Switzerland
[9] Imperial Coll London, Dept Med, London, England
[10] NHLBI, Hematopoiet Transplantat Sect, Bldg 10, Bethesda, MD 20892 USA