1. Boston University School of Social Work, Boston, MA, USA
2. U.S. Department of Veterans Affairs, Center for Healthcare Organization and Implementation Research, Edith Nourse Rogers Memorial Veterans Hospital, Bedford, MA, USA
3. U.S. Department of Veterans Affairs, National Center on Homelessness among Veterans, Tampa, FL USA
4. School of Public Health, University of Alabama Birmingham, Birmingham, AL USA
5. Birmingham Alabama, Veterans Affairs Medical Center, Birmingham, AL, USA