1. GCP Center, Shunde Hospital, Southern Medical University (The First People’s Hospital of Shunde Foshan), Foshan 528300, Guangdong, China
2. Department of Gastrointestinal Surgery, Shunde Hospital, Southern Medical University (The First People’s Hospital of Shunde Foshan), Shunde, Foshan, Guangdong Province 528300, China
3. The Second School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong Province 510080, China