1. Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
2. Department of General Surgery, Sir Run Run Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
3. Department of Bariatric and Metabolic Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China