1. Department of Hepatobilliary Surgery of Drum Tower Clinical Medical College, Nanjing Medical University, Nanjing, 210008 Jiangsu Province, China
2. Department of General Surgery, Sir Run Run Hospital, Nanjing Medical University, Nanjing, 211100 Jiangsu Province, China
3. Department of General Surgery, Northern Jiangsu People's Hospital, Yangzhou, 225001 Jiangsu Province, China
4. Department of Hepatobilliary Surgery, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, China