[1] Columbia Univ, Div Pediat Hematol Oncol & Stem Cell Transplant, New York, NY USA
[2] Dana Farber Canc Inst, Dept Biostat & Computat Biol, Boston, MA 02115 USA
[3] McMaster Childrens Hosp, Hamilton Hlth Sci, Div Hematol Oncol, Hamilton, ON, Canada
[4] San Jorge Childrens Hosp, San Juan, PR USA
[5] Albert Einstein Coll Med, Bronx, NY 10467 USA
[6] Columbia Univ, Med Ctr, Pediat Hematol Oncol Stem Cell Transplantat, New York, NY USA
[7] Univ Montreal, St Justine Univ Hosp, Charles Bruneau Canc Ctr, Div Hematol Oncol, Montreal, PQ, Canada
[8] Ctr Hosp Univ Quebec, Ste Foy, PQ, Canada
[9] Inova Fairfax Hosp Children, Falls Church, VA USA
[10] Brown Univ, Hasbro Childrens Hosp, Pediat Hematol Oncol, Providence, RI 02912 USA
[11] Dana Farber Canc Inst, Dept Pediat Oncol, Boston, MA 02115 USA
[12] Boston Childrens Hosp, Boston, MA USA