Departments of Surgery. Rescu, Li Ka Shing Knowledge Institute. Division of Emergency Medicine, Department of Medicine Faculty of Medicine. Departments of Emergency Medicine. Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, ON, Canada. Department of Laboratory Medicine and Molecular Diagnostics, Sunnybrook Health Sciences Centre, Toronto, ON, Canada. Trauma Surgery, Texas Health Presbyterian Hospital, Dallas, TX. Surgery, Regions Hospital, St. Paul, MN. Emergency Medicine, Oregon Health & Science University, Portland, OR. Surgery, John Peter Smith Health Network, Fort Worth, TX. Department of Emergency Medicine, Baylor University Medical Center, Dallas, TX. Johns Hopkins School of Medicine, Baltimore, MD. Department of Surgery, McGovern Medical School, University of Texas Health Science Center, Houston, TX. Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee, WI. Department of Emergency Medicine, University of British Columbia, Vancouver, BC, Canada. British Columbia Emergency Health Services, Vancouver, BC, Canada. Biostatistics, University of Washington, Seattle, WA. Department of Surgery, University of Alabama, Birmingham, AL. Department of Surgery, Scripps Memorial Hospital La Jolla, La Jolla, CA. Departments of Emergency Medicine and Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX. Providence Health Care Research Institute, Vancouver, BC, Canada. Surgery, University of Cincinnati, Cincinnati, OH. Department of Surgery, Mayo Clinic, Rochester, MN. Department of Emergency Medicine, Hennepin County Medical Center, Minneapolis, MN. Department of Surgery, St. Michael's Hospital, Toronto, ON, Canada. Department of Emergency Medicine, Medical City Plano, Plano, TX. Emergency Medicine, Methodist Dallas Medical Center, Dallas, TX. National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD. Trauma Surgery, Texas.