1. Department of Public Health Sciences The University of Texas at El Paso El Paso Texas USA
2. Battle Creek VA Medical Center U.S. Department of Veterans Affairs Battle Creek MI USA
3. Department of Rehabilitation Sciences The University of Texas at El Paso El Paso Texas USA
4. The Office of Medical Education Research and Development (OMERAD) and Department of Epidemiology and Biostatistics Michigan State University East Lansing Michigan USA
5. US Department of Veterans Affairs National Center on Homelessness Among Veterans Washington District of Columbia USA
6. School of Public Health University of Texas Health Science Center at Houston Houston Texas USA
7. Department of Psychiatry Yale University School of Medicine New Haven Connecticut USA