1. Department of General Surgery, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi, China
2. Laboratory of Surgical Oncology, Peking University People’s Hospital, Beijing, China
3. National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
4. Department of Gastroenterology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China