Harahap, Y. et al. 2018. SIMULTANEOUS QUANTIFICATION OF TAMOXIFEN AND 4-HYDROXY-N-DESMETHYLTAMOXIFEN LEVELS IN HUMAN PLASMA BY LIQUID CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY: DEVELOPMENT AND APPLICATION IN BREAST CANCER PATIENTS. International Journal of Applied Pharmaceutics. 10, 1 (Dec. 2018), 370–375. DOI:https://doi.org/10.22159/ijap.2018.v10s1.82.