For citations:
Vуsotskaya I.V., Letyagin V.P., Vorotnikov I.K., Kirsanov V.U., Gladilina I.A., Kim E.A. Oral contraceptives and menopausal hormone therapy as breast cancer risk categories. Tumors of female reproductive system. 2019;15(2):42-51. (In Russ.) https://doi.org/10.17650/1994-4098-2019-15-2-42-51