1. Geriatric Research, Education, & Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
2. Department of Psychiatry & Behavioral Science, University of Washington School of Medicine, Seattle, WA, USA
3. Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
4. Group Health Research Institute, Seattle, WA, USA
5. Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
6. Mental Health Service, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
7. Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA