The diagnostic criteria currently adopted for the diagnosis of AIH-PBC OS are based on the Paris criteria, with diagnostic components for AIH including: (1) ALT levels > 5 times ULN, (2) IgG levels > 2 times ULN or ASMA-positivity, (3) evidence of lymphocytic infiltration in the portal and periportal regions, accompanied by moderate or severe interface hepatitis. Here, GPT is linked to autoimmune hepatitis.