On the demography of aging.
D000368:Aged; D000375:Aging; D003710:Demography; D005190:Family; D005260:Female; D006304:Health Status; D006801:Humans; D008017:Life Expectancy; D008019:Life Style; D008297:Male; D012179:Retirement; D012737:Sex Factors; D014481:United States