1. Department of Hepatobiliary Surgery, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
2. Both the authors contributed equally to this article
3. Department of Anesthesiology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
4. Department of General Surgery, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
5. Department of Geriatric Surgery, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China