1. Department of General Surgery, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, P.R. China
2. Key Laboratory of Hepatosplenic Surgery, Ministry of Education, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, P.R. China
3. Department of Thoracic Surgery, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
4. Department of Hepatobiliary and Pancreatic Surgery, Qunli Branch, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
5. Department of Hepatobiliary and Pancreatic Surgery, Qunli Branch, the First Affiliated Hospital of Harbin Medical University, No.2075, 7th Qunli Avenue, Daoli District, Harbin, Heilongjiang 150010, PR China
6. Key Laboratory of Hepatosplenic Surgery, Ministry of Education, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
7. Department of General Surgery, the First Affiliated Hospital of Harbin Medical University, No. 23 Youzheng Road, Nangang District, Harbin, Heilongjiang 150081, P.R. China