title: User groups.
authors.forename: V
authors.initials: V
authors.lastname: Rees
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control* / Q000635:transmission; D001315:Australia; D015658:HIV Infections / Q000517:prevention & control* / Q000635:transmission; D006801:Humans; D013287:Illicit Drugs; D010379:Peer Group; D012657:Self-Help Groups; D015819:Substance Abuse, Intravenous / Q000534:rehabilitation*
chemical_list: D013287:Illicit Drugs