1. Arizona Emergency Medicine Research Center, College of Medicine, The University of Arizona, Phoenix
2. Department of Emergency Medicine, College of Medicine, The University of Arizona, Tucson
3. Arizona Department of Health Services, Bureau of EMS, Phoenix, Arizona
4. Mel and Enid Zuckerman College of Public Health, The University of Arizona, Tucson
5. Barrow Neurological Institute at Phoenix Children’s Hospital, Department of Child Health/Neurosurgery, College of Medicine, The University of Arizona, Phoenix