Columbia subject headings:
AIDS (Disease)--United States--Prevention.
Drug addicts--Diseases--United States.
Hypodermic needles--Health aspects.
Intravenous drug abuse--United States.
Harvard subject headings:
AIDS (Disease)--United States--Prevention
Intravenous drug abuse--United States.
Intravenous drug abusers--Diseases--United States.
Needle sharing--Health aspects.
Princeton subject headings:
AIDS (Disease)--United States--Prevention.
Intravenous drug abuse--United States.
Intravenous drug abusers--Diseases--United States.
Needle sharing--Health aspects.