Columbia subject headings:
Hospital patients--Drug testing--United States.
Hospitals--Substance abuse services--United States.
Medical screening--United States.
Substance abuse--Diagnosis--United States.
Wounds and injuries--Complications--United States.
Harvard subject headings:
Hospital patients--Drug testing--United States.
Hospitals--Substance abuse services--United States.
Medical screening--United States.
Substance abuse--Diagnosis--United States.
Wounds and injuries--Complications--United States.
Princeton subject headings: