1. Faculty of Medicine, University of British Columbia; Department of Emergency Medicine; 7th Floor, 828 West 10th Avenue Research Pavilion Vancouver BC Canada V5Z 1M9
2. University of British Columbia; School of Medicine; 317 - 2194 Health Sciences Mall Vancouver British Columbia Canada V6T 1Z3
3. Centre for Community Child Health Research; BC Injury Research and Prevention Unit; 4480 Oak Street, L 408 Vancouver BC Canada V6H 3V4
4. University of British Columbia; Department of Pediatrics and BC Injury Research and Prevention Unit; L408-4480 Oak Street Vancouver BC Canada V6H 3V4