NAFLD, non-alcoholic fatty liver disease; wt, weight; ALT, alanine aminotransferase; PP, Prothrombine-proconvertin ratio; NAS: Non-alcoholic fatty liver disease activity score; %ID, percentage of the injected dose of 18F-FDGal accumulated in the liver; SUV: standardised uptake value; COV: coefficient of variation; a: based on steatosis activity fibrosis (SAF) score, b: based on Kleiner fibrosis score. The gene discussed is GPT; the disease is alcoholic fatty liver disease.