Preoperative Characteristics of the patients.

*HBsAg: hepatitis B surface antigen; HBeAg: hepatitis B e antigen; BMI:Body mass index.HBV-DNA(+) indicated hepatitis B DNA>2000 U/ml; IQR: interquartile range; ALT, alanine aminotransferase; AST, aspartate aminotransferase. ASA: American Society of Anesthesiologists category. Pulmonary disease indicated chronic obstructive pulmonary disease, asthma, chronic bronchitis and tuberculosis. Cardiovascular disease included coronary heart disease, previous coronary revascularization, cerebral arterial occlusive disease, and/or peripheral vascular occlusive disease. Tumor size indicated the sum of all the tumors diameter.