B, Christian, Daniel Sampepajung, Prihantono Prihantono, and Berti Nelwan. 2017. “Relationship of P-Glycoprotein (Pgp) Expression and Estrogen Receptor (ER) Expression in Invasive Ductal Carcinoma of Breast Cancer”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 32 (1):345-51. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7021.