| Affiliation: | 1. Division of Oncology, The Children's Hospital of Philadelphia, , Philadelphia, Pennsylvania;2. University of Wisconsin School of Medicine and Public Health, , Madison, Wisconsin;3. Department of Biostatistics, Colleges of Medicine and Public Health and Health Professions, University of Florida, , Gainesville, Florida;4. Division of Hematology‐Oncology, Doernbecher Children's Hospital/Oregon Health & Science University, , Portland, Oregon;5. Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, , Philadelphia, Pennsylvania |
