Columbia subject headings:
Hospital utilization--Length of stay--United States--Statistics--Periodicals.
Medicare--Statistics--Periodicals.
Older people--Diseases--United States--Statistics--Periodicals.
Older people--Hospital care--United States--Statistics--Periodicals.
Older people--Surgery--United States--Statistics--Periodicals.
Operations, Surgical--United States--Statistics--Periodicals.
United States--Statistics, Medical--Periodicals.
Harvard subject headings:
Hospital utilization--Length of stay--United States--Statistics--Periodicals.
Medicare--Statistics--Periodicals.
Older people--Diseases--United States--Statistics--Periodicals.
Older people--Hospital care--United States--Statistics--Periodicals.
Older people--Surgery--United States--Statistics--Periodicals.
Operations, Surgical--United States--Statistics--Periodicals.
United States--Statistics, Medical--Periodicals.
Princeton subject headings: