1. The gap report;Joint United Nations Programme on HIV/AIDS(UNAIDS),2014
2. Sexually transmitted diseases enhance HIV transmission no longer a hypothesis;Cohen;Lancet,1998
3. HIV incidence among men with and those without sexually transmitted rectal infections: estimates from matching against an HIV case registry;Pathela;Clin Infect Dis,2013
4. High risk for HIV following a diagnosis of syphilis, men living in Florida, 2000-2011;Peterman;Public Health Rep,2014
5. Centers for Disease Control and Prevention [Internet]. Atlanta, GA: Department of Health & Human Services; c2014-2017 [cited 2017 Oct 20]. STDs and HIV–CDC fact sheet: people who have STDs are more likely to get HIV, when compared to people who do not have STDs; [about 2 screens]. Available from: https://www.cdc.gov/std/hiv/stdfact-std-hiv.htm.