Columbia subject headings:
Harvard subject headings:
Health services accessibility--United States
Medical policy--United States
Medically underserved areas--United States.
Poor--Health and hygiene--United States.
Poor--Medical care--United States
Princeton subject headings:
Health services accessibility--United States.
Medical policy--United States.
Medically underserved areas--United States.
Poor--Health and hygiene--United States.
Poor--Medical care--United States.