1. Research Institute of General Surgery, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210002, P. R. China
2. Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, P. R. China
3. Research Institute of General Surgery, Jinling Hospital, Nanjing Medical University, Nanjing 210002, China
4. Department of General Surgery, Anhui No.2 Provincial Peoples’ Hospital, Anhui 230041, P. R. China
5. Key Laboratory of High Performance Polymer Material and Technology of MOE, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
6. Department of General Surgery, BenQ Medical Center, The Affiliated BenQ Hospital of Nanjing Medical University, Nanjing 210019, P. R. China