Columbia subject headings:
Chronic diseases--Economic aspects--United States.
Health insurance--United States.
Medical emergencies--Economic aspects--United States.
Medical policy--United States.
Harvard subject headings:
Catastrophic illness.
Chronic diseases--Economic aspects--United States.
Health insurance--United States
Medical emergencies--Economic aspects--United States.
Medical policy--United States
Princeton subject headings:
Chronic diseases--Economic aspects--United States.
Health insurance--United States.
Medical emergencies--Economic aspects--United States.
Medical policy--United States.