XRCC1 and hepatocellular carcinoma: The XRCC1 Arg399Gln polymorphism was related to the risk of HCC in the Arg399Gln homozygous genetic model (OR = 1.61, 95% CI: 1.40–1.85, Pheterogeneity < 0.05; Fig 2), recessive genetic model (OR = 1.40, 95% CI: 1.23–1.59, Pheterogeneity < 0.05; Fig 3), dominant genetic model (OR = 1.56, 95% CI: 1.45–1.69, Pheterogeneity < 0.05; Fig 4), and heterozygous genetic model (OR = 1.55, 95% CI: 1.42–1.68, Pheterogeneity < 0.05).