1. Center for Health Equity Research & Promotion, U.S. Department of Veterans Affairs (VA), Philadelphia, PA, USA;
2. National Center on Homelessness Among Veterans, VA, Birmingham, AL, USA;
3. Health Services Research & Development, Birmingham VA Medical Center, Birmingham, AL, USA;
4. School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA;
5. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA;
6. South Central Mental Illness Research, Education, and Clinical Center, Southeast Louisiana Veterans Health Care System, New Orleans, LA, USA;
7. School of Medicine, Tulane University, New Orleans, LA, USA