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Comparison of frequency of symptomatic patients to all patients enrolled in this study according to genotypes of ADH1B and ALDH2. A, There was no difference in the frequency of the symptomatic patients by ADH1B genotype. B, There was no difference in the frequency of the symptomatic patients by ALDH2 genotype. Abbreviations: ADH1B, alcohol dehydrogenase subunit; ALDH2, aldehyde dehydrogenase 2
