GPT and autoimmune hepatitis: HCV, hepatitis C virus; HBV, hepatitis B virus; AIH, autoimmune hepatitis; HDV, hepatitis D virus; CTP, Child-Turcotte-Pugh; HRV, high-risk varices; TLC, total leucocyte count; PLT, platelet; AST, aspartate aminotransferase; ALT, alanine aminotransferase; INR, international normalized ratio