1. Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania;
2. Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania;
3. Medical Specialty Service Line, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania;
4. Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania;
5. Geriatric Research Education and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania;
6. Department of Behavioral and Community Health Sciences, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania;
7. Veterans Research Foundation of Pittsburgh, Pittsburgh, Pennsylvania;
8. VISN 4 Healthcare Network, Pittsburgh, Pennsylvania.