Columbia subject headings:
Medical care--Care and hygiene--United States.
Medical care--United States.
Medicine, Preventive--United States.
Medicine, Preventive.
Older people--Health and hygiene--United States.
Older people--Medical care--United States.
Harvard subject headings:
Medical care--United States
Medicine, Preventive--United States.
Older people--Medical care--United States.
Princeton subject headings:
Medical care--United States.
Medicine, Preventive--United States.
Older people--Medical care--United States.