1. Medical College of Wisconsin, Department of Emergency Medicine, Milwaukee, Wisconsin
2. University of Arizona, College of Medicine, Department of Emergency Medicine, Tucson, Arizona Arizona Emergency Medicine Research Center, Tucson, Arizona
3. Houston Fire Department, Houston, Texas McGovern Medical School at the University of Texas Health Science Center at Houston (UTHealth), Department of Emergency Medicine, Houston, Texas
4. Houston Fire Department, Houston, Texas Baylor College of Medicine, Texas Children’s Hospital and Department of Pediatrics, Section of Emergency Medicine, Houston, Texas