1. University of New Mexico Cancer Center and Departments of Pathology and Internal Medicine, University of New Mexico, Albuquerque;
2. Children's Oncology Group, Arcadia, CA;
3. Department of Pathology, St Jude Children's Research Hospital, Memphis, TN;
4. Department of Genetics, University of Alabama, Birmingham;
5. Department of Biostatistics, St Jude Children's Research Hospital, Memphis, TN;
6. College of Public Health, University of Georgia, Athens;
7. Cancer Therapy Evaluation Program, Pediatric Oncology, National Cancer Institute, Bethesda, MD;
8. Departments of Pediatrics, Hematology and Oncology, and Cancer Center, New York University Medical Center, NY;
9. Children's Oncology Group Statistics & Data Center and Department of Epidemiology and Health Policy Research, College of Medicine, University of Florida, Gainesville;
10. Cook Children's Medical Center, Forth Worth, TX;
11. Department of Pediatrics, Hematology, Oncology and Transplantation, Medical College of Wisconsin, Milwaukee;
12. Department of Hematology-Oncology, Children's National Medical Center, Washington, DC; and
13. Children's Hospital, Department of Pediatrics and University of Colorado Cancer Center, University of Colorado Denver School of Medicine, Aurora