1 Department of Gastrointestinal Surgery, the First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, China.
2 Center for Digestive Disease, the Seventh Affiliated Hospital of Sun Yat-sen University, 628 Zhenyuan Road, Shenzhen, 518000, Guangdong, China.
3 Department of Gastrointestinal Surgery, the First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, China. heyulong@mail.sysu.edu.cn.
4 Center for Digestive Disease, the Seventh Affiliated Hospital of Sun Yat-sen University, 628 Zhenyuan Road, Shenzhen, 518000, Guangdong, China. heyulong@mail.sysu.edu.cn.
5 Department of Gastrointestinal Surgery, the First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, China. denisewei@126.com.
6 Center for Digestive Disease, the Seventh Affiliated Hospital of Sun Yat-sen University, 628 Zhenyuan Road, Shenzhen, 518000, Guangdong, China. zhchangh@mail.sysu.edu.cn.