1. Emergency Health Services Nova Scotia, Halifax, Nova Scotia, Canada.
2. Division of EMS, Department of Emergency Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
3. Nova Scotia Health Halifax, Nova Scotia, Canada.
4. Center for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada.
5. School of Nursing, University of British Columbia, Vancouver, British Columbia, Canada.
6. School of Occupational Therapy, Dalhousie University, Halifax, Nova Scotia, Canada.