[1] Childrens Natl Hlth Syst, Dept Pediat Neuropsychol, Washington, DC USA
[2] George Washington Univ, Sch Med, Washington, DC USA
[3] Univ Pittsburgh, Dept Pediat, Pittsburgh, PA 15260 USA
[4] Univ Colorado Denver, Childrens Hosp Colorado, Aurora, CO USA
[5] City Hope Natl Med Ctr, Behav Res Sect, Dept Pediat, Med Ctr, Duarte, CA USA
[6] Harvard Univ, Sch Med, Dana Farber Canc Inst, 44 Binney St, Boston, MA 02115 USA
[7] Univ Texas Hlth Sci Ctr San Antonio, Dept Pediat Hematol Oncol, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA