Heba, M. E., Magdy, M. S., Nadia, M. M., Ahmed, A. Z., Yahia, M. I., Nelly, H. A. (2013). Role of Ki67 in predicting resistance to adjuvant tamoxifen in postmenopausal breast cancer patients. Journal of the Egyptian National Cancer Institute. https://doi.org/10.1016/j.jnci.2013.02.001