1. Department of Gastrointestinal Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, P.R. China
2. First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, P.R. China
3. Department of General Surgery, Zhongda Hospital, Southeast University, Nanjing, Jiangsu 210000, P.R. China
4. Department of Oncology, Affiliated Hospital of Nanjing University of Chinese Medicine and Jiangsu Province Hospital of Chinese Medicine, Nanjing, Jiangsu 210029, P.R. China