Division of Haematology/Oncology, Department of Paediatrics, Hospital for Sick Children and University of Toronto, Toronto, ON, Canada. Child Health Evaluative Sciences, Research Institute, Hospital for Sick Children, Toronto, ON, Canada. Kingston General Hospital, Kingston, ON, Canada. Pediatric Hematology Oncology, CHU Ste-Justine, University of Montreal, Montreal, QC, Canada. Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada. Alberta Children's Hospital, Calgary, AB, Canada. Division of Pediatric Hematology/Oncology, Department of Pediatrics, IWK Health Centre, Halifax, NS, Canada; and. Department of Nursing, Hospital for Sick Children, Toronto, ON, Canada.