| Affiliation: | 1. Pediatric Hematology/Oncology, Children's Hospitals and Clinics of Minnesota, Minneapolis, Minnesota;2. Biostatistics, University of Alberta, Calgary, Alberta, Canada;3. Pediatrics, Dana Farber Cancer Institute/Children's Hospital, Boston, Massachusetts;4. Radiaton Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas;5. Department of Epidemiology and Cancer Control, St. Jude Children's Research Hospital, Memphis, Tennessee;6. Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York |
