Arana A, Cuchi T, Arellano F. Strengthening EU pharmacovigilance. European pharmaceutical contractor. European pharmaceutical contracto: EPC. 2009;44-5.
Johannes CB, Crawford SL, Longcope C, McKinley SM. Bleeding patterns and changes in the perimenopause: a longitudinal characterization of menstrual cycles. Clin Consultations Obstetr Gynecol. 1996;8:9-20.