1 Department of Surgery, Brooke Army Medical Center, San Antonio, TX. Electronic address: maryjbar@aol.com.
2 Department of Surgery, Brooke Army Medical Center, San Antonio, TX.
3 Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD.
4 Army Trauma Training Detachment, US Army Medical Department Center and School, Fort Sam Houston, TX; Army Trauma Training Detachment, US Army Medical Department Center and School, Miami, FL.