1 Division of Haematology/Oncology (Denburg, Greenberg); Child Health and Evaluative Sciences (Denburg, Ungar), Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children; Institute for Health Policy, Management and Evaluation (Ungar), University of Toronto; Pediatric Oncology Group of Ontario (Greenberg), Toronto, Ont. avram.denburg@sickkids.ca.
2 Division of Haematology/Oncology (Denburg, Greenberg); Child Health and Evaluative Sciences (Denburg, Ungar), Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children; Institute for Health Policy, Management and Evaluation (Ungar), University of Toronto; Pediatric Oncology Group of Ontario (Greenberg), Toronto, Ont.