Authors: Massai, R Miranda, P Valdes, P Lavin, P Zepeda, A Casado, ME Silva, MA Fetis, G Bravo, C Chandia, O Peralta, O Croxatto, HB Diaz, S

Citation: R. Massai et al., Preregistration study on the safety and contraceptive efficacy of a progesterone-releasing vaginal ring in Chilean nursing women, CONTRACEPT, 60(1), 1999, pp. 9-14