UGT1A1 and gallstones: Variants of the gene encoding UGT1A1 (uridine 5’-diphosphate (UDP)- glucuronosyltransferase 1A1) responsible for bilirubin conjugation were correlated with the risk of gallstones and stone bilirubin content, suggesting common factors in the pathogenesis of cholesterol and pigment gallstones [31].