1 U. S. Army Institute of Surgical Research, Fort Sam Houston, 3698 Chambers Rd, TX 78234, United States.
2 Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD 20814, United States; San Antonio Military Medical Center, 3551 Roger Brooke Dr, Ft Sam Houston, TX 78219, United States.
3 Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD 20814, United States; David Grant USAF Medical Center, Clinical Investigation Facility, 101 Bodin Circle, Travis AFB, CA 94535, United States. Electronic address: ian.stewart@us.af.mil.
4 Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd, Bethesda, MD 20814, United States; U. S. Army Institute of Surgical Research, Fort Sam Houston, 3698 Chambers Rd, TX 78234, United States.