Aging populations and the emergence of prepaid health plans: a health promotion opportunity.
D000368:Aged; D006279:Health Maintenance Organizations / Q000458:organization & administration*; D006293:Health Promotion / Q000458:organization & administration*; D006299:Health Services for the Aged / Q000458:organization & administration*; D006801:Humans; D011157:Population Dynamics; D014481:United States