1. The Translational Research Center for TBI and Stress Disorders (TRACTS), Veterans Affairs Boston Healthcare System , Boston, MA 02130, USA
2. Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign , Champaign, IL 61280, USA
3. Department of Social, Behavioral, and Population Sciences, Tulane School of Public Health & Tropical Medicine , New Orleans, LA 70112, USA
4. Department of Medicine, Duke University , Durham, NC 27710, USA
5. Geriatric Research, Education, and Clinical Center, Durham Veterans Affairs Healthcare System , Durham, NC 27705, USA
6. National Center for PTSD, Behavioral Science Division, Veterans Affairs Boston Healthcare System , 150 S Huntington Ave, Boston, MA 02130, USA
7. Department of Psychiatry, Boston University Chobanian & Avedisian School of Medicine , Boston, MA 02118, USA