1 General Surgery Department, Baoan Central Hospital, Xixiang Street, Bao 'an District, Shenzhen, 518000, Guangdong, PR China. Electronic address: Song_xianqing@126.com.
2 General Surgery Department, Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai, 200000, PR China. Electronic address: lxy8746@126.com.
3 General Surgery Department, Baoan Central Hospital, Xixiang Street, Bao 'an District, Shenzhen, 518000, Guangdong, PR China.
4 General Surgery Department, Ningbo Fourth Hospital, No. 291 Donggu road, Dandong street, Xiangshan County, Ningbo, Zhejiang, 315000, PR China. Electronic address: 499789412@qq.com.