1. Centers for Disease Control and Prevention (2011) HIV in the United States. Available: http://www.cdc.gov/hiv/resources/factsheets/PDF/us.pdf. Accessed 2012 Oct.
2. World Health Organization Regional Office for Europe (2010) HIV/AIDS Surveillance in Europe. Available: http://ecdc.europa.eu/en/publications/Publications/111129_SUR_Annual_HIV_Report.pdf. Accessed 2012 Oct.
3. Joint United Nations Programme on HIV/AIDS (2010) UNAIDS Report on the Global AIDS Epidemic 2010. Available: http://www.unaids.org/globalreport/documents/20101123_GlobalReport_full_en.pdf. Accessed 2012 Oct.
4. World Health Organization Regional Office for South-East Asia. (2009) HIV/AIDS in the Southeast Asia region 2009. Available: http://www.searo.who.int/LinkFiles/Publications_HIV_AIDS_Report2009.pdf. Accessed 2012 Oct.
5. State Council AIDS Working Committee Office, People's Republic of China (2008) A Joint Assessment of HIV/AIDS Prevention, Treatment and Care in China 2007. Available: http://www.chinaids.org.cn/n435777/n443716/appendix/Joint_Assessment_EN.pdf. Accessed 2012 October.