1. VA National Center on Homelessness Among Veterans, US Department of Veterans Affairs, Washington, DC, USA
2. VA Central Western Massachusetts Healthcare System, Leeds, MA, USA
3. Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
4. Department of Management, Policy, and Community Health, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
5. Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA