1. Department of General Surgery, Zhujiang Hospital (The Second School of Clinical Medicine), Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
2. Department of Breast and Thyroid Surgery, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, Hunan 410005, P.R. China
3. Hunan Provincial Key Laboratory of Emergency and Critical Care Metabonomics, Institute of Emergency Medicine, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, Hunan 410005, P.R. China
4. Laboratory of Hepatobiliary Molecular Oncology, Department of Hepatobiliary Surgery, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, Hunan 410005, P.R. China