1. Department of Sports Science and Clinical Biomechanics Faculty of Health University of Southern Denmark Odense Denmark
2. Division of Epidemiology Dalla Lana School of Public Health University of Toronto ON Canada
3. Nordic Institute of Chiropractic and Clinical Biomechanics Odense Denmark
4. School of Public Health and the Alberta Centre for Injury Control and Research University of Alberta Edmonton AB Canada
5. Division of Health Care and Outcomes Research Toronto Western Research Institute University Health Network Toronto ON Canada