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Beckwith, Curt G., Carla C. Moreira, Hesham M. Aboshady, Nickolas Zaller, Josiah D. Rich, ja Timothy P. Flanigan. A Success Story: HIV Prevention for Injection Drug Users in Rhode Island. BioMed Central, 2006.

Beckwith, Curt G., et al. A Success Story: HIV Prevention for Injection Drug Users in Rhode Island. BioMed Central, 2006.