Columbia subject headings:
Diagnosis related groups--United States--Statistics.
Hospital patients--United States--Classification--Statistics.
Hospital utilization--United States--Statistics.
Harvard subject headings:
Diagnosis related groups--United States--Statistics.
Hospital patients--United States--Classification--Statistics.
Hospital utilization--United States--Statistics
Princeton subject headings:
Diagnosis related groups--United States--Statistics.
Hospital patients--United States--Classification--Statistics.
Hospital utilization--United States--Statistics.
Statistics.