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Mean treatment duration (weeks) by CYP2C19 genotypes in functional dyspeptic patients who were treated with cimetidine in Korea. It showed significant differences among the different CYP2C19 subgroups. It was the shortest in the V/V among the CYP2C19 genotypes (wild type homozygote: 5.1±1.5, heterozygote: 4.0±1.7, variant homozygote: 2.1±0.7; p<0.001).
