Columbia subject headings:
Clinical trials--United States--Statistical methods--Congresses.
Drug addiction--Treatment--United States--Statistical methods--Congresses.
Harvard subject headings:
Clinical trials--United States--Statistical methods--Congresses.
Conference papers and proceedings.
Drug addiction--Treatment--United States--Statistical methods--Congresses.
Opium abuse--Treatment--United States--Statistical methods--Congresses.
Princeton subject headings:
Clinical trials--United States--Statistical methods--Congresses.
Drug addiction--Treatment--United States--Statistical methods--Congresses.
Opium abuse--Treatment--United States--Statistical methods--Congresses.