GPT and chronic kidney disease: AST: Aspartate aminotransferase, ALT: Alanine transaminase, COPD: Chronic obstructive pulmonary disease, CKD: Chronic kidney disease, HTN: Hypertension, NAFLD: Non-alcoholic fatty liver disease, NASH: Non-alcoholic steatohepatitis, HBV: hepatitis B virus, HCV: Hepatitis C virus, ULN: Upper limit of normal, TBIL: Total bilirubin.