Columbia subject headings:
Harvard subject headings:
AIDS (Disease)--European Union countries--Prevention.
Drug abuse--European Union countries.
Injections, Intravenous--Health aspects--European Union countries.
Intravenous drug abuse--Patients--European Union countries.
Princeton subject headings:
AIDS (Disease)--Prevention.
AIDS (Disease)--Transmission.
Drug abuse--Prevention.
Intravenous drug abuse.