At 1 month of age, blood tests revealed cholestatic liver disease [total bilirubin: 19.9 mg/dl, direct bilirubin: 9.6 mg/dl, aspartate aminotransferase (AST): 4,330 U/L, alanine aminotransferase (ALT) 705 U/L, gamma glutamyl transferase (GGT): 50 U/L, serum bile acids: 480 μmol/L]. This evidence concerns the gene GPT and liver disorder.