1. Departments of Emergency Medicine and Community Health Sciences, University of Calgary Cumming School of Medicine, Foothills Medical Centre, Calgary, Alberta, Canada
2. Department of Emergency Medicine, University of British Columbia, St. Paul’s Hospital, Vancouver, British Columbia, Canada
3. Centre for Health Services and Policy Research, School for Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
4. Department of Urologic Sciences, St. Paul’s Hospital, Vancouver, British Columbia, Canada
5. Department of Emergency Medicine, St. Pauls Hospital, Vancouver, British Columbia, Canada