1 Child Health Evaluative Sciences, The Hospital for Sick Children; Institute for Clinical Evaluative Sciences; Division of Emergency Medicine, The Hospital for Sick Children; Clinical Pharmacology and Toxicology, The Hospital for Sick Children; Pediatrics, Pharmacology, and Toxicology, Faculty of Medicine, University of Toronto.
2 Child Health Evaluative Sciences, The Hospital for Sick Children; Institute for Clinical Evaluative Sciences; Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.