1. Department of Pediatrics, University of British Columbia, Vancouver, Canada;
2. Departments of Emergency Medicine, and of Biomedical & Molecular Sciences, Queen’s University, Kingston, Canada;
3. Ontario Poison Centre, Toronto, Canada;
4. ICES, Toronto, Canada;
5. Sunnybrook Research Institute, Sunnybrook Hospital, Toronto, Canada;
6. Departments of Medicine and Pediatrics, University of Toronto, Toronto, Canada;
7. Divisions of Emergency Medicine and Clinical Pharmacology and Toxicology, Hospital for Sick Children, Toronto, Canada;
8. Departments of Pediatrics and Pharmacology and Toxicology, University of Toronto, Toronto, Canada