1. Digestive Department, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, PR China
2. Department of General Surgery, Wuxi Second Hospital of Traditional Chinese Medicine, Wuxi, Jiangsu 214000, PR China
3. Department of General Surgery, Wuxi Xishan People's Hospital, Wuxi, Jiangsu 214000, PR China
4. Pathology Department, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, PR China
5. Pathology Department, Wuxi Xishan People's Hospital, Wuxi, Jiangsu 214000, PR China
6. Oncology Department, Wuxi Fifth People's Hospital, Wuxi, Jiangsu 214000, PR China