1Poison and Drug Information Service, Foothills Medical Centre, 1403-29th St NW, Calgary, Alberta T2N 2 T9 Canada
2Section of Clinical Pharmacology and Toxicology, Alberta Health Services, Calgary, AB Canada
3Department of Emergency Medicine, University of Calgary, Calgary, AB Canada
4Departments of Emergency Medicine, and of Biomedical and Molecular Sciences, Queen’s University, Kingston, ON Canada
5Ontario Poison Centre, Toronto, ON Canada
6Department of Pediatrics, University of Calgary, Calgary, AB Canada
7Department of Community Health Sciences, University of Calgary, Calgary, AB Canada
8Alberta Children’s Hospital Research Institute for Child and Maternal Health, Calgary, AB Canada
9Division of Emergency Medicine, Department of Pediatrics, CHU Sainte Justine, Montréal, Quebec Canada
10Prairie Regional Research Data Centre, Statistics Canada, Calgary, AB Canada
11Centre Antipoison du Québec, Québec, Québec Canada
12Department of Emergency Medicine, University of British Columbia, Vancouver, BC Canada
13Department of Emergency Medicine, Oregon Health Sciences University, Portland, OR USA
14Department of Pediatrics, University of Colorado School of Medicine, Denver, CO USA