Awareness and knowledge of HPV, cervical cancer, and vaccines in young women after first delivery in São Paulo, Brazil - a cross-sectional study - Rama, Cristina H.; Villa, Luisa L.; Andreoli, Maria A.; Costa, Maria C.; Aoki, Aline L.; Longatto-Filho, Adhemar; Eluf-Filho, José (BMC Women¦s Health, 2010)