1. U.S. Air Force En Route Care Research Center 59th Medical Wing/ST, U.S. Army Institute of Surgical Research, 3698 Chambers Pass, Building 3611, JBSA Fort Sam Houston, TX 78234.
2. Department of Emergency Medicine, San Antonio Military Medical Center, 3551 Roger Brooke Drive, JBSA Fort Sam Houston, TX 78234.
3. Department of Emergency Medicine, School of Medicine, University of Colorado, 19th Avenue, Aurora, CO 80045.
4. Colorado Air National Guard, Buckley Air Force Base, 18860 East Breckenridge Avenue, Aurora, CO 80011.