1. Division of Pediatric Emergency Medicine, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
2. Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
3. Division of Pediatric Emergency Medicine, McMaster Children’s Hospital, Hamilton Health Sciences, Hamilton, Ontario, Canada
4. Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
5. Department of Pediatrics and Emergency Medicine, Children’s Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario, Canada
6. CHEO Research Institute, Ottawa, Ontario, Canada
7. Department of Paediatrics, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
8. Department of Epidemiology & Biostatistics, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
9. Children’s Health Research Institute, University of Western Ontario, London, Ontario, Canada
10. Division of Pediatric Medicine, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
11. Department of Respiratory Therapy, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
12. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
13. Division of Clinical Pharmacology and Toxicology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
14. for the Pediatric Emergency Research Canada (PERC) Network