1. Department of Oncology, The Third People’s Hospital of Hubei Province, Affiliated Hospital of Jianghan University, Wuhan City, Hubei Province, China
2. Department of General Surgery, The First Medical Center for Chinese PLA General Hospital , Beijing, China
3. Department of General Surgery, PLA Marine Corps Hospital, Chaozhou City, China
4. Department of General Surgery, No.215 Hospital of Shaanxi Nuclear Industry, Xianyang City, China