1. Military Traumatic Brain Injury Initiative (MTBI2) , Bethesda, MD 20814, USA
2. Division of Neurosurgery, Walter Reed National Military Medical Center , Bethesda, MD 20889, USA
3. Department of Neurosurgery, San Antonio Military Medical Center , JBSA Fort Sam Houston, TX 78234, USA
4. Joint Trauma System , JBSA Fort Sam Houston, TX 78234-6315, USA
5. San Antonio Uniformed Services Health Education Consortium , Joint Base San Antonio-Fort Sam Houston, TX 7234, USA
6. Department of Surgery, Naval Medical Center San Diego, Uniformed Services University of the Health Sciences , San Diego, CA 92134, USA
7. Baltimore C-STARS, USAFSAM, R Adams Cowley Shock Trauma Center, University of Maryland , Baltimore, MD 21201, USA
8. Department of Surgery, San Antonio Military Medical Center , JBSA Fort Sam Houston, TX 78234, USA