[The mechanism of aging and medical intervention].
D000206:Actuarial Analysis; D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D005853:Geriatrics; D006801:Humans; D007223:Infant; D008017:Life Expectancy; D008875:Middle Aged