ALDH2 and hepatocellular carcinoma: The overall meta-analysis did not suggest any association between ALDH2 rs671 and HCC susceptibility for AA + GA genotype vs. GG genotype (OR = 1.10, P = 0.369), AA genotype vs. GA + GG genotype (OR = 1.19, P = 0.357), AA genotype vs. GG genotype (OR = 1.08, P = 0.509), and GA genotype vs. GG genotype (OR = 1.06, P = 0.569; Fig. 2 and Table 3).