1. Geriatric Research Education and Clinical Center (GRECC), VA Puget Sound Health Care System, 1660 S. Columbian Way, Seattle, WA 98108, USA
2. Division of Geriatrics and Gerontology, Department of Medicine, University of Washington School of Medicine, 325 9th Ave, Seattle, WA 98104, USA
3. Rehabilitation Care Services, VA Puget Sound Health Care System, 1660 S. Columbian Way, Seattle, WA 98108, USA
4. Geriatric Research Education and Clinical Center (GRECC), VA Tennessee Valley Health Care System, 1310 24th Avenue South Nashville, Nashville, TN 37212, USA
5. Division of Geriatrics, Vanderbilt School of Medicine, 2147 Belcourt Ave., Suite 100, Nashville, TN 37212, USA