Columbia subject headings:
Ambulatory medical care--Utilization--United States.
Community mental health services--Utilization--United States.
Hospitals--Outpatient services--United States.
Hospitals--Outpatient services.
Mental health services--United States.
Harvard subject headings:
Ambulatory medical care--Utilization--United States.
Community mental health services--Utilization--United States.
Hospitals--Outpatient services
Hospitals--Outpatient services--United States.
Princeton subject headings:
Ambulatory medical care--Utilization--United States.
Community mental health services--Utilization--United States.