1. Department of Radiation Oncology, London Health Sciences Centre, London, Canada;
2. Department of Emergency Medicine, Grand River and St. Mary’s General Hospitals, Kitchener, Canada;
3. Department of Emergency Medicine, Queen's University, Kingston, Canada;
4. Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Canada;
5. Ontario Poison Centre, Toronto, Canada;
6. Poison and Drug Information Service, Alberta Health Services, Calgary, Canada;
7. Section of Clinical Pharmacology and Toxicology, Alberta Health Services, Calgary, Canada;
8. Department of Emergency Medicine, University of Calgary, Calgary, Canada;
9. Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Canada;
10. Department of Pediatrics, University of Calgary, Calgary, Canada;
11. Department of Emergency Medicine, Oregon Poison Center, Oregon Health and Science University, Portland, OR, USA;
12. Department of Emergency Medicine, University of Colorado School of Medicine, Denver, CO, USA;
13. Department of Pediatrics, University of Colorado School of Medicine, Denver, CO, USA