University of Washington - Department of Environmental and Occupational Health Sciences, University of Washington - Department of Environmental and Occupational Health Sciences, VA Puget Sound Health Care System - Geriatric Research Education and Clinical Center, University of Michigan at Ann Arbor - Department of Epidemiology, University of Washington - Department of Biostatistics, University of Washington - Department of Biostatistics, Kaiser Permanente Washington Health Research Institute, University of Washington - Department of Environmental and Occupational Health Sciences, University of Washington - School of Medicine, University of Washington - School of Medicine and University of Washington - Department of Biostatistics