1. Department of Pathology; Tianjin Union Medical Center; Tianjin China
2. Nankai University School of Medicine; Nankai University; Tianjin China
3. Department of Pathology; Affiliated Hospital of Logistic University of People's Armed Police Force; Tianjin China
4. Graduate School; Tianjin University of Traditional Chinese Medicine; Tianjin China
5. Department of General Surgery; Tianjin Union Medical Center; Tianjin China
6. Departments of Colorectal Surgery; Tianjin Union Medical Center; Tianjin China