Knowledge of emergency contraception does not affect its use among brazilian high-school adolescents - Chofakian, Christiane Borges do Nascimento; Sato, Ana Paula Sayuri; Borges, Ana Luiza Vilela; Hoga, Luiza Akiko Komura; Fujimori, Elizabeth; Alencar, Gizelton Pereira (International Conference on Family Planning, 2013)