1. Nanfang Hospital, Southern Medical University, Guangzhou, China
2. School of Nursing, Southern Medical University, Guangzhou, China
3. Department of General Medicine, Zhuzhou Central Hospital, Zhuzhou, China
4. Department of Anatomy, University of Otago, Dunedin, New Zealand
5. Department of the Trauma center, Zhuzhou Central Hospital, Zhuzhou, China
6. Department of hepatobiliary surgery, Zhuzhou Central Hospital, Zhuzhou, China
7. Department of Pathology, University of Otago, Dunedin, New Zealand