Prevalence and risk factors of syphilis and human immunodeficiency virus co-infection at a university hospital in Brazil

by Alex Maurício Garcia Santos, Valter Romão de Souza Júnior, Fábio Lopes de Melo, Ana Emília Costa de Araújo Aquino, Maria Olivia Aureliano Ramos, Lucas Marinho Araújo, Celso Rodrigues de Lira, Patrícia Maria sobral, François Figueiroa, Heloisa Ramos Lacerda de Melo, Paulo Sérgio Ramos de Araújo