1. Children’s National Medical Center, Washington, DC, USA;
2. Department of Biostatistics, Colleges of Medicine, Public Health & Health Professions, University of Florida, Gainesville, FL, USA;
3. St. Charles Medical Center, Bend, OR, USA;
4. Department of Pediatric Hematology/Oncology, University of Texas Southwestern Medical Center, Dallas, TX, USA;
5. Department of Pediatrics, Benioff Children’s Hospital, San Francisco, CA, USA;
6. Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA;
7. Department of Pediatrics and Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA;
8. Department of Pediatrics and the Center for Childhood Cancer Research, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA;
9. Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA