1. Regional Trauma Services, Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada.
2. University of Aberdeen, Aberdeen, Scotland.
3. Alberta Health, Edmonton, Alberta, Canada.
4. Banff Mineral Springs Hospital, Banff, Alberta, Canada.
5. Tactical Emergency Medical Services, Alberta Health Services, Calgary, Alberta, Canada.
6. Department of Emergency Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
7. Department of Radiology, Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada.
8. Vancouver Coastal Hospital, Vancouver, British Columbia, Canada.
9. Department of Surgery, Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada.
10. Department of Critical Care Medicine, Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada.
11. Northside Hospital, Cumming, Georgia.
12. Department of Surgery, Grady Memorial Hospital, Atlanta, Georgia.