21.   The survey also found widespread agreement that felons and known drug users should be barred from owning guns.

22.   There is a growing concern about the spread of AIDS among drug users.

23.   Today the United States has about a million injecting drug users.

24.   We are getting the message across to drug users that sharing needles is a high-risk behaviour.

25.   We set up a counselling service for drug users.

26.   Children of drug users are predisposed to addiction.

27.   ...drug users who use unsterile equipment for injections of drugs.

28.   At college she began consorting with drug users, eventually becoming an addict herself.

29.   In Asia, the virus had spread rapidly among intravenous drug users and female prostitutes.

30.   Most HIV-positive intravenous drug users are also infected by hepatitis C virus.