Columbia subject headings:
Hospital utilization--United States--Statistical services--Evaluation.
Medical records--Abstracting and indexing--Evaluation.
Harvard subject headings:
Hospital utilization--United States--Statistical services--Evaluation.
Medical records--Abstracting and indexing--Evaluation.
Princeton subject headings:
Hospital utilization--United States--Statistical services--Evaluation.
Medical records--Abstracting and indexing--Evaluation.