1. Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
2. Department of Immunology, Biochemistry and Molecular Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin 300070, China
3. Department of Pathology, Tianjin Union Medical Center, Tianjin 300121, China
4. Department of Imaging, Tianjin Union Medical Center, Tianjin 300121, China