Essiben, Felix, Esther JN Um Meka, Gregory Ayissi, Henri Essome, Etienne Atenguena, and Pascal Foumane. 2020. “Factors Associated With Breast Cancer Occurrence before the Age of 40 in Yaoundé”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9 (2):782-88. https://doi.org/10.18203/2320-1770.ijrcog20200377.