HLA-DRB1 and hepatocellular carcinoma: Under the fixed effect model, the combined OR for the association of HLA-DRB1*07 allele with the risk for HCC in the whole populations was determined to be 1.65 (95% CI: 1.08-2.51; p = 0.02), and under the random effects model was 1.77 (95%CI: 0.88-3.56; p = 0.11).