1 Department of Hepatobiliary Pancreatic Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
2 Department of Thyroid Surgery, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
3 General Practice Department, the Second Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou 310009, China.
4 Department of Hepatobiliary Pancreatic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China; Key Laboratory of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Tumor of Zhejiang Province, Hangzhou 310009, China. Electronic address: wam@zju.edu.cn.