1. Department of General Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, P.R. China
2. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, P.R. China
3. Department of Pathology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, P.R. China
4. Department of General Surgery, Shaanxi Provincial People’s Hospital, Xi’ an, P.R. China
5. Department of Geriatric Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, P.R. China
6. Department of High Talent, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, P.R. China