Affiliation: | 1. Nationwide Children's Hospital, , Columbus, Ohio;2. Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine and Abramson Family Cancer Research Institute, , Philadelphia, Pennsylvania;3. A.I. duPont Hospital for Children, , Wilmington, Delaware;4. The Children's Hospital at Montefiore, , Bronx, New York;5. Texas Tech University Health Sciences Center, , Lubbock, Texas;6. Duke University Medical Center, , Durham, North Carolina;7. St. Jude Children's Research Hospital, , Memphis, Tennessee;8. Cancer Therapy Evaluation Program, NCI, , Bethesda, Maryland |