Columbia subject headings:
Drug Abuse Warning Network--Data processing.
Drugs--Overdose--United States--Data processing.
Medication abuse--United States--Data processing.
Substance abuse--United States--Data processing.
Harvard subject headings:
Drug Abuse Warning Network--Data processing.
Drugs--Overdose--United States--Data processing.
Medication abuse--United States--Data processing.
Substance abuse--United States--Data processing.
Princeton subject headings:
Drug Abuse Warning Network--Data processing.
Drugs--Overdosage--United States--Data processing.
Medication abuse--United States--Data processing.
Substance abuse--United States--Data processing.