Columbia subject headings:
Medical care--United States--Charts, diagrams, etc.
Medical care--United States--Statistics.
Medical economics--United States--Charts, diagrams, etc.
Medical economics--United States--Statistics.
Harvard subject headings:
Medical care--United States--Charts, diagrams, etc.
Medical care--United States--Statistics.
Medical economics--United States--Charts, diagrams, etc.
Medical economics--United States--Statistics.
United States--Statistics, Medical.
Princeton subject headings: