1. Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
2. Pancreatic Disease Research Centre, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
3. Department of General Surgery, Suzhou Science & Technology Town Hospital, Suzhou 215006, China
4. Department of General Surgery, Suzhou Hospital Affiliated to Nanjing Medical University, Suzhou 215006, China
5. Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China