1. U.S. Department of Veterans Affairs, Center for Healthcare Outcomes and Implementation Research, Bedford, MA, USA
2. National Center on Homelessness among Veterans, Philadelphia, PA, USA
3. School of Social Work, Boston University, MA, USA
4. U.S. Department of Veterans Affairs, Center for Health Equity Research and Promotion, Philadelphia, PA, USA
5. U.S. Department of Veterans Affairs, South Central Mental Illness, Research, Education and Clinical Center, New Orleans, LA, USA
6. School of Medicine, Louisiana State University, New Orleans, USA
7. Health Services Research & Development, Birmingham, AL Veterans Affairs Medical Center, Birmingham, USA
8. School of Public Health, University of Alabama at Birmingham, USA