1Division of Haematology/Oncology, The Hospital for Sick Children, Toronto, Canada
2Program in Child Health Evaluative Sciences, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, Toronto, Canada
3Department of Emergency Medicine, The Hospital for Sick Children, Toronto, Canada
4Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, United States
5Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, United States
6Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, United States
7Department of Pediatrics, Stanford University, Stanford, California, United States
8Information Services and Technology, Children's Healthcare of Atlanta, Atlanta Georgia, United States
9Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, United States
10Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts, United States
11Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
✉Address for correspondence Adam P. Yan, MD, MBI Division of Haematology/Oncology, The Hospital for Sick Children, 555 University Avenue, Toronto, Ontario M5G1 × 8, Canada, Email: adam.yan@sickkids.ca