1. Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, P.R. China;
2. Hubei Key Laboratory of Digestive System, Renmin Hospital of Wuhan University, Wuhan, P.R. China;
3. Hubei Provincial Clinical Research Center for Digestive Disease Minimally Invasive Incision, Renmin Hospital of Wuhan University, Wuhan, P.R. China;
4. Department of Gastroenterology, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, P.R. China;
5. Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiaotong University, Shanghai, China;
6. Department of Gastroenterology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, China.