Affiliation: | aDepartment of Medicine, University of Washington, Seattle, WA, United States bDepartment of Epidemiology, University of Washington, Seattle, WA, United States cDepartment of Biostatistics, University of Washington, Seattle, WA, United States dDepartment of Health Services, University of Washington, Seattle, WA, United States eDepartment of Statistics, Oklahoma State University, Stillwater, OK, United States fSeattle Epidemiologic Research and Information Center, VA Puget Sound Health Care System, Seattle, WA, United States |