Liver function tests during the same period showed that biomarkers of liver damage (ALT and AST) and cholestasis (ALP and γ-GT) and serum total bilirubin exceeded the upper limits of their respective normal ranges, while erythrocyte, leukocyte and platelet counts were within normal ranges, as was creatinine (Cr) in kidney function tests. This evidence concerns the gene GPT and cholestasis.