1. Defence Research and Development Canada, Toronto Research Centre, Toronto, Ontario, Canada, and Department of Psychology, University of Toronto St. George
2. Defence Research and Development Canada, Suffield Research Centre, Medicine Hat, Alberta, Canada
3. Defence Research and Development Canada, Toronto Research Centre, Toronto, Ontario, Canada
4. Defence Research and Development Canada, Medicine Hat, Alberta, Canada
5. Director General Military Personnel Research and Analysis, Ottawa, Ontario, Canada
6. Canadian Forces Health Services, Ottawa, Ontario, Canada, and Department of Surgery, Division of General Surgery, University of Toronto
7. Canadian Forces Health Services and Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada