Male and female opinions on the female condom among HIV positive women or women at risk in Ribeirão Preto, Brazil - Vieira, Elisabeth Meloni; Machado, Alcyone Artioli; Duarte, Geraldo; Souza, R. H. B.; Segatto, B. C. A.; Pandolfi, T. C. (Microbicides 2002, 2002)