1. Department of Hepatobiliary-Pancreatic Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang Province 310014, PR China
2. Department of General Surgery, Bejing Anzhen Hospital, Capital Medical University, Beijing 100000, PR China
3. Department of Interventional Therapy and Vascular Surgery, Hunan Provincial People's Hospital, Changsha, Hunan Province 410005, PR China
4. Genetron Health (Beijing) Technology, Co. Ltd., Changping, Beijing 100000, PR China