1. From the Department of Pediatrics, Emory University School of Medicine (S.M.C., F.G.K.), and Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta (S.M.C., F.G.K.) — both in Atlanta; the Department of Biostatistics, Children’s Oncology Group, Statistics and Data Center, University of Florida, Gainesville (Q.P., Y.W.), and the Department of Radiation Oncology, Mayo Clinic Florida, Jacksonville (B.S.H.); the Institute for Clinical Research and Health Policy Studies and Tufts Cancer...