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HIV prevention, treatment, and care services for people who inject drugs: a systematic review of global, regional, and national coverage.
Mathers BM, Degenhardt L, Ali H, Wiessing L, Hickman M, Mattick RP, Myers B, Ambekar A, Strathdee SA; for the 2009 Reference Group to the UN on HIV and Injecting Drug Use. Lancet. 2010; 375:1014-28