, Shaimaa Lasheen and Leila Rashed, M. Z. , B. B. , A. F. , A. R. , S. E. “Resistance to Trastuzumab in Clinical Her2 Breast Cancer: Possible Relation to Molecular Subtype and Cancer Stem Cells”. International Journal of Medical Science and Clinical Invention, vol. 3, no. 8, Aug. 2016, http://valleyinternational.net/index.php/ijmsci/article/view/538.