The results showed that, among 49 individuals, there were 5 individuals with homozygous genotype ADH1B * 1/ADH1B * 1 (10.2%); 29 individuals have the ADH1B * 2/ADH1B * 2 homozygous genotype (59.2%) and 15 individuals have the ADH1B * 1/ADH1B * 2 heterozygous genotype (30.6%).