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Quantitation of three-month intraindividual variability and influence of sex and menstrual cycle phase on CYP1A2, N-acetyltransferase-2, and xanthine oxidase activity determined with caffeine phenotyping.
Kashuba AD, Bertino JS Jr, Kearns GL, Leeder JS, James AW, Gotschall R, Nafziger AN. Kashuba AD, et al. Among authors: nafziger an. Clin Pharmacol Ther. 1998 May;63(5):540-51. doi: 10.1016/S0009-9236(98)90105-9. Clin Pharmacol Ther. 1998. PMID: 9630827 Clinical Trial.
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