1. Department of General Surgery, Gaochun People’s Hospital, Nanjing, Jiangsu, China
2. Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
3. Department of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
4. Department of Hepatopancreato-Biliary Surgery, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China