1. Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
2. Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310016, China
3. Department of Gastroenterology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, 510000, China