1. Department of Emergency Medicine, University of British Columbia, Vancouver, Canada
2. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
3. Faculty of Medicine, Memorial University of Newfoundland, St John’s, Canada
4. Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, Canada
5. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
6. Department of Pediatrics, University of British Columbia, Vancouver, Canada