UGT1A1 and Gilbert syndrome: Gilbert’s syndrome is characterized by mutations to the UGT1A1 gene located on the long arm (q) of chromosome 2 (2q37) which encodes the enzyme uridine disphosphate-glucuronosyltransferase-1A1 (UGT1A1) which is required for the conjugation and subsequent excretion of bilirubin [8–10].