Columbia subject headings:
Airlines--Employees--Legal status, laws, etc.--United States.
Assistance in emergencies--United States.
Medical personnel--Malpractice--United States.
Travelers--Medical care--Law and legislation--United States.
Harvard subject headings:
Princeton subject headings:
Assistance in emergencies--United States.
Emergency medical services--Law and legislation--United States.
Medical personnel--Malpractice--United States.
Travelers--Medical care--United States.