Harahap, Y., Astrini, C. R., & Suryadi, H. (2018). VALIDATION OF 6-MERCAPTOPURINE AND 6-THIOGUANINE IN DRIED BLOOD SPOT BY ULTRA PERFORMANCE LIQUID CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY. International Journal of Applied Pharmaceutics, 10(1), 412–415. https://doi.org/10.22159/ijap.2018.v10s1.91