1. Department of General Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi, China
2. College of Nursing, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi, China
3. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi, China