UGT1A7 and hepatocellular carcinoma: Among virus(+) subjects, the OR of HCC for the UGT1A7*3/*3 genotype was 3.4 (0.3–45) and 2.2 (0.3–15) when we classified the subjects according to enzymatic activity and 0.1 (0.02–0.6) (p = 0.01) and 0.2 (0.04–0.6) (p = 0,007) respectively, for virus(-) heavy-drinking subjects.