1. National Registry of Emergency Medical Technicians, Columbus, Ohio
2. Division of Epidemiology, The Ohio State University College of Public Health, Columbus, Ohio
3. Medical College of Wisconsin, Milwaukee County EMS, Milwaukee, Wisconsin
4. Cumming School of Medicine, University of Calgary, Calgary, Alberta
5. Department of Pediatrics, Baylor College of Medicine, Houston, Texas
6. ESO Inc., Austin, Texas
7. Office of Emergency Medical Services, Virginia Department of Health, and the Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
8. Missouri Department of Health and Senior Services, and the Washington University in St Louis School of Medicine, St Louis, Missouri
9. Department of Emergency Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio