UGT1A9 and Hyperbilirubinemia: Although we did not observe a significant correlation between hyperbilirubinemia and UGT1A1 genotype (poor metabolizers with UGT1A1*6/*28, *27/*28, or *28/*28 vs. extensive metabolizers with UGT1A1 *1/*1, *1/*6, *1/*27, or *1/*28), there was a significant correlation with the UGT1A9 I399C/C genotype (P = 0.028) (Table 3).