1. Joint United Nations Programme on HIV/AIDS (2019). UNAIDS Data 2019. Available from: https://www.unaids.org/sites/default/files/media_asset/2019-UNAIDS-data_en.pdf. Accessed 20 Feb 2020.
2. Joint United Nations Programme on HIV/AIDS (2018). Miles to go—closing gaps, breaking barriers, righting injustices. Available from: http://www.unaids.org/sites/default/files/media_asset/miles-to-go_en.pdf. Accessed 20 Feb 2020
3. MMWR Morbidity and mortality weekly report. Centers for Disease Control and Prevention (CDC). Interim guidance: preexposure prophylaxis for the prevention of HIV infection in men who have sex with men. 2011;60(3):65–8.
4. MMWR Morbidity and mortality weekly report. Centers for Disease Control and Prevention (CDC). Interim guidance for clinicians considering the use of preexposure prophylaxis for the prevention of HIV infection in heterosexually active adults. 2012;61(31):586–9.
5. Grant RM, Lama JR, Anderson PL, McMahan V, Liu AY, Vargas L, et al. Preexposure chemoprophylaxis for HIV prevention in men who have sex with men. N Engl J Med. 2010;363(27):2587–99. https://doi.org/10.1056/NEJMoa1011205.