1. Geriatrics Research Education and Clinical Center, Veterans Affairs Maryland Health Care System, Baltimore, Maryland, USA
2. Seattle Epidemiologic Research and Information Center, Veterans Affairs Puget Sound Health Care System, Seattle, Washington, USA
3. Seattle–Denver Center of Innovation for Veteran-Centered and Value-Driven Care, Health Services Research and Development, Veterans Affairs Puget Sound Health Care System, Seattle, Washington, USA
4. Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, USA
5. Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
6. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA