1. Department of Surgery, University of California Davis, 2221 Stockton Boulevard, Sacramento, CA 95817.
2. Clinical Investigation Facility, David Grant USAF Medical Center, 101 Bodin Circle, Travis Air Force Base, CA 94535.
3. United States Army Institute of Surgical Research, 3698 Chambers Pass, Bldg. 3611 JBSA Fort Sam Houston, TX 78234.
4. San Antonio Military Medical Center, 3551 Roger Brooke Dr, JBSA Fort Sam Houston, TX 78234.
5. Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD 20814.