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17. Katrusiak AE, Paterson PG, Kamencic H, Shoker A, Lyon AW. Pre-column derivatization high-performance liquid chromatographic method for determination of cysteine, cysteinyl-glycine, homocysteine and glutathione in plasma and cell extracts. J Chromatogr B Biomed Sci Appl. 2001;758(2):207-12.