1. AIDS.Gov. Preexposure prophylaxis (PrEP). 2013. Available at: http://aids.gov/hiv-aids-basics/prevention/reduce-your-risk/pre-exposure-prophylaxis/. Accessed April 2, 2014.
2. Centers for Disease Control and Prevention. Pre exposure prophylaxis: questions and answers. 2013. Available at: http://www.cdc.gov/hiv/prevention/research/prep/. Accessed April 2, 2014.
3. World Health Organization. International travel and health: rabies. Available at: http://www.who.int/ith/vaccines/rabies/en/. Accessed April 18, 2014.
4. Infectious diseases related to travel: malaria;Centers for Disease Control and Prevention,2014
5. UNAIDS. Global report: UNAIDS report on the global AIDS epidemic 2013. 2013. Available at: http://www.unaids.org/en/resources/campaigns/globalreport2013/globalreport/. Accessed February 15, 2014.