G. A. R. da Silva, “Prevalence of asymptomatic urethritis by Chlamydia trachomatis and Neisseria gonorrhoeae and associated risk factors among males living with HIV-1”, Rev. Inst. Med. Trop. São Paulo, vol. 60, p. e11, Jan. 2018, doi: 10.1590/S1678-9946201860011.