Affiliation: | 1. Department of Emergency Medicine, Mayo Clinic Florida, 4500 San Pablo Road, Jacksonville, FL 32224, United States;2. Department of Emergency Medicine, University of Arizona, PO Box 245057, 1501 N. Campbell, Tucson, AZ 85724-5057, United States;3. ZOLL Medical, 269 Mill Road, Chelmsford, MA 01824, United States;4. Guardian Medical Transport, 1200 N Beaver Street, Flagstaff, AZ 86001, United States;5. Mesa Fire and Medical Department, 13 W First Street, Mesa, AZ 85201, United States;6. Bureau of Emergency Medical Services, Arizona Department of Health Services, 150 N. 18th Avenue, #540, Phoenix, AZ 85007, United States;g Arizona State University, Phoenix, AZ, United States;h Maricopa Medical Center, Phoenix, AZ, United States;i Department of Emergency Medicine, The Ohio State University Wexner Medical Center ,760 Prior Hall 376 West 10th Avenue, Columbus, OH, 43210, United States;j University of Arizona College of Medicine, Phoenix, AZ, United States |