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 Respiratory Medicine, Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
4. Ontario Child Health Support Unit, SickKids Research Institute, Toronto, Ontario, Canada
5. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
6. Research Institute, Clinical Research Services, The Hospital for Sick Children, Toronto, Ontario, Canada
7. Department of Biostatistics, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
8. Divisions of Pediatric Emergency Medicine and Clinical Pharmacology and Toxicology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
9. Departments of Pediatrics and Emergency Medicine, Alberta Children’s Hospital, University of Calgary, Calgary, Alberta, Canada
10. Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
11. Department of Pediatrics and Emergency Medicine, Children’s Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario, Canada
12. CHEO Research Institute, Ottawa, Ontario, Canada
13. Department of Pediatric Emergency Medicine, CHU Sainte-Justine, Montréal, Quebec, Canada
14. Department of Pediatrics and of Social and Preventive Medicine, Université de Montréal, Montréal, Quebec, Canada
15. Departments of Pediatrics, Emergency Medicine, and Physiology & Pharmacology, Alberta Children’s Hospital, Calgary, Alberta, Canada
16. Alberta Children’s Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
17. Division of Pediatric Emergency Medicine, British Columbia Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
18. Departments of Pediatrics and Emergency Medicine, Stollery Children’s Hospital, University of Alberta, Edmonton, Alberta, Canada
19. Pediatrics/Pediatric Emergency Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
20. Children’s Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
21. Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
22. Pharmacy Department, The Hospital for Sick Children, Toronto, Ontario, Canada
23. Sections of Pediatric Emergency Medicine and Gastroenterology, Departments of Pediatrics and Emergency Medicine, Alberta Children’s Hospital, Alberta Children’s Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada