1. Department of Molecular and Cellular Oncology the University of Texas MD Anderson Cancer Center Houston TX 77030 USA
2. Guangdong Provincial Key laboratory of Colorectal and Pelvic Floor Disease the Sixth Affiliated Hospital of Sun Yat‐sen University Guangzhou Guangdong 510020 P. R. China
3. Research Institute of Gastroenterology the Sixth Affiliated Hospital of Sun Yat‐sen University Guangzhou Guangdong 510020 P. R. China
4. Department of Imaging Physics the University of Texas MD Anderson Cancer Center Houston TX 77030 USA
5. Department of Medical Oncology Sun Yat‐sen University Cancer Center Guangzhou Guangdong 510060 P. R. China
6. Department of Pathology the University of Texas MD Anderson Cancer Center Houston TX 77030 USA
7. Department of Emergency Medicine the University of Texas MD Anderson Cancer Center Houston TX 77030 USA