Affiliation: | aArizona Department of Health Services Bureau of Emergency Medical Services and Trauma System, Phoenix, AZ;bDepartment of Emergency Medicine, Maricopa Medical Center, Phoenix, AZ;cUniversity of Arizona Sarver Heart Center, Tucson, AZ;dDepartment of Medicine, University of Arizona College of Medicine, Tucson, AZ;eDepartment of Emergency Medicine, University of Arizona College of Medicine, Tucson, AZ;fCritical Care Medicine, Children's Hospital of Philadelphia, Philadelphia, PA;gDepartment of Emergency Medicine, Mayo Clinic, Jacksonville, FL |