1. Centers for Disease Control and Prevention. HIV Surveillance Report, 2009, vol. 21. http://www.cdc.gov/hiv/topics/surveillance/resources/reports/ . Accessed 10 July 2011.
2. Montgomery JP, Mokotoff ED, Gentry AC, Blair JM. The extent of bisexual behaviour in HIV-infected men and implications for transmission to their female sex partners. AIDS Care. 2003;15(6):829–37.
3. Sanchez T, Finlayson T, Drake A, Behel S, Cribbin M, Dinenno E, et al. Human immunodeficiency virus (HIV) risk, prevention, and testing behaviors—United States, National HIV Behavioral Surveillance System: men who have sex with men, November 2003–April 2005. MMWR Surveill Summ. 2006;55(6):1–16.
4. Schmidt MA, Mokotoff ED. HIV/AIDS surveillance and prevention: improving the characterization of HIV transmission. Public Health Rep. 2003;118(3):197–204.
5. Centers for Disease Control and Prevention. HIV/AIDS Surveillance Report, 2007, vol. 19. 2009. http://www.cdc.gov/hiv/topics/surveillance/resources/reports/ . Accessed 2 June 2011.