Columbia subject headings:
Health insurance--United States.
Medical care, Cost of--United States.
Medically uninsured persons--United States.
Harvard subject headings:
Health insurance--United States
Medical care, Cost of--United States
Medically uninsured persons--United States.
Princeton subject headings:
Health insurance--United States.
Medical care, Cost of--United States.
Medically uninsured persons--United States.