1. Department of Surgical Oncology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China
2. Department of Surgical Oncology, The Third Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi, China
3. Department of General Surgery, Xi'an No. 3 Hospital, Xi'an, Shaanxi, China
4. Department of Surgical Oncology, The Affiliated Hospital of Xi’an Medical University, Xi'an Medical University, Xi'an, Shaanxi, China