1. Gastroenterology and Urology Department I, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, P.R. China
2. Oncology Department I, Hunan Provincial Hospital of Integrated Traditional Chinese and Western Medicine, Changsha, P.R. China
3. Gastroduodenal Pancreas Surgery Department, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, P.R. China