1. Department of General Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing 210009, China
2. The Third People’s Hospital of Dalian, Dalian Medical University, Dalian 116033, China
3. Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, No. 87 Dingjiaqiao, Nanjing 210009, China