[1] Rainbow Babies & Childrens Hosp, Div Pediat Hematol & Oncol, 11100 Euclid Ave, Cleveland, OH 44106 USA
[2] Case Western Reserve Univ, Dept Pediat, Cleveland, OH 44106 USA
[3] Childrens Hosp Philadelphia, Div Oncol, Philadelphia, PA 19104 USA
[4] Univ Penn, Dept Pediat, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] St Jude Childrens Res Hosp, Dept Epidemiol & Canc Control, 332 N Lauderdale St, Memphis, TN 38105 USA
[6] Fred Hutchinson Canc Res Ctr, Div Clin Res, 1124 Columbia St, Seattle, WA 98104 USA
[7] Mem Sloan Kettering Canc Ctr, Weill Cornell Med Coll, Dept Pediat, 1275 York Ave, New York, NY 10021 USA
[8] Univ Texas MD Anderson Canc Ctr, Dept Radiat Phys, Div Radiat Oncol, Houston, TX 77030 USA