Risk factors associated with syphilis among patients at a sexual health center in Brazil: A retrospective study Cristhiane Campos Marques, Fabiana Nunes de Carvalho Mariz, Thaisa Campos Marques, Juliana Tessari Dias Rohr, Berenice Moreira, Paula Beatriz Santiago, Nathália Araujo Varela da Costa, Juliana Marques de Oliveira, Otávio Toledo Nóbrega, Carla Nunes de Araújo

Hepatitis C prevalence among men who have sex with men in Central Brazil Andreia Alves de Andrade, Ágabo Macêdo da Costa e Silva, Megmar Aparecida dos Santos Carneiro, Sheila Araújo Teles, Regina Maria Bringel Martins

HIV testing and HIV knowledge among men who have sex with men in Natal, Northeast Brazil Monica Baumgardt Bay, Marise Reis de Freitas, Marcia Cavalcante Vinhas Lucas, Elizabeth Cristina Fagundes de Souza, Angelo Giuseppe Roncalli