Columbia subject headings:
Harvard subject headings:
Children of prenatal substance abuse--Research--United States--Methodology--Congresses.
Drug abuse in pregnancy--Research--United States--Methodology--Congresses.
Pregnant women--Drug use--Research--United States--Methodology--Congresses.
Princeton subject headings:
Children of prenatal substance abuse--Research--United States--Methodology--Congresses.
Drug abuse in pregnancy--Research--United States--Methodology--Congresses.
Pregnant women--Drug use--Research--United States--Methodology--Congresses.