Able elderly in the family context: changes, chances, and challenges.
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008875:Middle Aged; D009026:Mortality; D011157:Population Dynamics