1. From the National Registry of Emergency Medical Technicians (MAB),
Columbus, Ohio; the Division of Environmental Health Sciences (JMC) and the Division of Epidemiology (JRW), College of Public Health, The Ohio State University,
Columbus, Ohio; the Emergency Medical Services Performance Improvement Center, Department of Emergency Medicine, University of North Carolina (ARF),
Chapel Hill, North Carolina; and the Carolinas Medical Center, The Center for Prehospital Medicine and Mecklenburg EMS Agency (a...