[The elderly, the aged...: who are they?].
D000368:Aged / Q000523:psychology* / Q000706:statistics & numerical data*; D005260:Female; D005851:Geriatric Nursing; D006299:Health Services for the Aged; D006707:Homes for the Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D020380:Needs Assessment / Q000458:organization & administration*