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Methadone maintenance and hepatitis C virus infection among injecting drug users.

N. Crofts, L. Nigro, L. Nigro, 1997, Addiction.

Effectiveness of community-based outreach in preventing HIV/AIDS among injecting drug users

C. Latkin, S. Friedman, R. Needle, 2005 .

Feasibility in needle exchange programme: an evaluation of a pilot programme in Catania, Sicily.

S. Bruno, L. Nigro, M. Matalone, 2000, The International journal on drug policy.