1. Department of Gastrointestinal Surgery, Xiangya HospitalCentral South University Changsha Hunan China
2. The Hunan Provincial Key Lab of Precision Diagnosis and Treatment for Gastrointestinal Tumor Changsha Hunan China
3. Hepatobiliary and Enteric Surgery Research Center, Xiangya HospitalCentral South University Changsha Hunan China
4. International Joint Research Center of Minimally Invasive Endoscopic Technology Equipment & Standardization Changsha Hunan China