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1 Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
2 Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Emergency Medicine, Royal Columbian Hospital, New Westminster, British Columbia, Canada.
3 Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Emergency Medicine, Vancouver General Hospital, Vancouver, British Columbia, Canada.
1 Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
2 Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Emergency Medicine, Royal Columbian Hospital, New Westminster, British Columbia, Canada.
3 Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Emergency Medicine, Vancouver General Hospital, Vancouver, British Columbia, Canada.