1 Department of General Surgery, Peking University First Hospital, No. 8 Xishiku Street, Beijing 100034, China.
2 Department of General Surgery, Peking University First Hospital, No. 8 Xishiku Street, Beijing 100034, China. Electronic address: 1911110261@pku.edu.cn.
3 Department of General Surgery, Peking University First Hospital, No. 8 Xishiku Street, Beijing 100034, China. Electronic address: 2211110367@bjmu.edu.cn.