AFP and hepatitis A virus infection: The laboratory tests consisted of alpha-fetoprotein (AFP), blood tests (i.e., total bilirubin, alanine transaminase, aspartate aminotransferase, and alkaline phosphatase), and hepatitis tests (i.e., HBsAg, HBsAb, HBeAg, HBeAb, HBcAb, and HCVAb).