Silva CM da, Peder LD de, Silva ES, Previdelli I, Pereira OCN, Teixeira JJV, Bertolini DA (2018) Impact of HBV and HCV coinfection on CD4 cells among HIV-infected patients: a longitudinal retrospective study. J Infect Dev Ctries 12:1009–1018. doi: 10.3855/jidc.10035