rs3814637 represents an intronic variant in the CYP2C19 gene. Although found within several CYP2C19 star alleles (CYP2C19*1.004, CYP2C19*1.005, and CYP2C19*15.001) that have normal function, the minor (T) allele of rs3814637 is associated with significantly lower maintenance doses of warfarin among UK BioBank participants.10.1101/2020.08.09.243311
[PMID 21692828
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