1. Department of Hepatobiliary Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, People's Republic of China
2. Department of General Surgery, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai 200080, People's Republic of China
3. R & D Department, Shanghai GeneChem Limited Company, Shanghai 201203, People's Republic of China
4. Department of Continuing Medical Education, The Affiliated Hospital of Qingdao University, Qingdao 266003, People's Republic of China
5. Department of Pathology, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai 200080, People's Republic of China