1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China
2. State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
3. Department of Oncology, Section II, Jiangmen Central Hospital, Affiliated Jiangmen Hospital of Sun Yat-sen University, Jiangmen, China
4. Department of Endoscopy and Laser, Sun Yat-sen University Cancer Center, Guangzhou, China
5. Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, China
6. Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China