1. Wodak A, Cooney A. Effectiveness of sterile needle and syringe programming in reducing HIV/AIDS among injecting drug users. Geneva: World Health Organization; 2005.
2. Needle R, Burrows D, Friedman S, et al. Effectiveness of community-based outreach in preventing HIV/AIDS among injection drug users. Geneva: World Health Organization; 2004.
3. Farrell M, Marsden J, Ling W, Ali R, Gowing L. Effectiveness of drug dependence treatment in preventing HIV among injecting drug users. Geneva: World Health Organization; 2005.
4. Piot P, Zewdie D, Turmen T. HIV/AIDS prevention and treatment. Lancet. 2002;360(9326):86–8.
5. UNGASS. Declaration of commitment on HIV/AIDS. New York: United Nations; 2001.