1. Mathers BM, Degenhardt L, Buccello C, Lemon J, Wiessing L, Hickman M: Mortality among people who inject drugs: a systematic review and meta-analysis. Bull World Health Organ. 2013, 91: 102-123. 10.2471/BLT.12.108282.
2. World Health Organization: HIV/AIDS: Injecting drug use. 2013, [ http://www.who.int/hiv/topics/idu/en/index.html ]
3. Rehm J, Ballunas D, Brochu S, Fischer B, Gnam W, Patra J, Popova S, Sarnocinska-Hart A, Taylor B: The Costs of Substance Abuse in Canada 2002: Highlights. 2006, Ottawa, ON: Canadian Centre on Substance Abuse
4. Canadian Centre on Substance Abuse: Injection Drug Users Overview. 2011, http://www.ccsa.ca/Eng/Topics/Populations/IDU/Pages/InjectionDrugUsersOverview.aspx ,
5. Archibald CP, Jayaraman GC, Major C, Patrick DM, Houston SM, Sutherland D: Estimating the size of hard-to-reach populations: A novel method using HIV testing data compared to other methods. AIDS. 2001, 15: S41-S48.