1. Epidemiology Program, Health Outcomes Military Exposures (HOME) (12POP5), Office of Patient Care Services, U.S. Department of Veterans Affairs, Washington, District of Columbia, USA
2. Office of Mental Health and Suicide Prevention, Veterans Health Administration, U.S. Department of Veterans Affairs, Washington, District of Columbia, USA
3. Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
4. Office of Research & Development (14RD), U.S. Department of Veterans Affairs, Washington, District of Columbia, USA