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