The Effect of Branched Chain Amino Acid to the Perioperative Nutritional Status: In Patients with Cirrhosis Undergoing Liver Resection and Patients Awaiting Liver Transplantation.

Interventions: Patients assigned for intervention group take Branched-chain amino acid formula as late-evening snack for 2 weeks preoperatively in hepatic resction,and for 4 weeks in liver transplantation,respectively. Administration of BCAA formula would be maintained for 12 weeks postoperatively in both procedure. Patients in the control group are observed without administration of BCAA formula. Primary outcome(s): Body cell mass Study Design: Parallel Non-randomized