UGT1A1 and liver disorder: In this study, a similar trend towards higher serum total and direct bilirubin concentration was observed for *28/*28 genotype (Figure 1A), however no statistically significant association was observed between serum total bilirubin concentration and UGT1A1 genotypes (Figure 1B) in patients with HCV or NAFLD suggesting that the effect of HCV liver disease may mask the influence of genotype that has been observed in other patient populations.