1. Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA, USA
2. Geriatric Research, Education, and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
3. Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
4. Cancer Prevention Research Program, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
5. Research and Development, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
6. Department of Neurology, University of Washington School of Medicine, Seattle, WA, USA
7. School of Public Health, Department of Epidemiology, Nutritional Sciences Program, University of Washington, Seattle, WA, USA
8. Department of Immunology, New York State Institute for Basic Research in Developmental Disabilities, New York, NY, USA