1. Department of Gastrointestinal Surgery, Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
2. Department of Hepatobiliary Surgery, Department of General Surgery, The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui, China
3. Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China