1. Centre for Health Evaluation & Outcome Sciences, University of British Columbia, Vancouver, British Columbia, Canada
2. Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada
3. British Columbia Emergency Health Services, Vancouver, British Columbia, Canada
4. Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
5. Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
6. Faculty of Medicine, Clinical Epidemiology, Memorial University of Newfoundland, St. John’s, Newfoundland, Canada
7. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
8. Public Health Laboratory, British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada
9. Canadian Blood Services, Ottawa, Ontario, Canada
10. Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada