1. Division of Haematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada;
2. Department of Pediatric Oncology/Stem Cell Transplant, Children’s Hospital of Philadelphia, Philadelphia, PA;
3. Children’s Oncology Group, Monrovia, CA;
4. Department of Biostatistics, University of Southern California, Los Angeles, CA;
5. Department of Pediatric Hematology and Oncology, Pediatric Hematology and Oncology, Johann Wolfgang Goethe University, Frankfurt, Germany; and
6. Division of Hematology/Oncology/Bone Marrow Transplantation, Children’s Mercy Hospitals and Clinics, Kansas City, MO