The levels of total bilirubin, conjugated bilirubin, ALT, AST, and GGT in these patients with cholestasis were 207 μmol/L (range 65–445 μmol/L), 162 μmol/L (range 46–412 μmol/L), 821 U/L (range 85–3,597 U/L), 532 U/L (range 127–3,633 U/L), and 244 U/L (range 79–3,800 U/L), respectively (Figure 2). This evidence concerns the gene GPT and cholestasis.