1. Department of Nasopharyngeal Carcinoma Sun Yat‐sen University Cancer Center State Key Laboratory of Oncology in Southern China Collaborative Innovation Center for Cancer Medicine Guangzhou China
2. Elekta Instrument Ltd. Beijing Branch Shanghai China
3. Department of Radiation Oncology Sun Yat‐sen University Cancer Center State Key Laboratory of Oncology in Southern China Collaborative Innovation Center for Cancer Medicine Guangzhou China
4. School of Physics and Electronics, Shandong Normal University Jinan China
5. Department of Pathology Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences Guangzhou China
6. Sun Yat‐sen University Cancer Center, State Key Laboratory of Oncology in Southern China Collaborative Innovation Center for Cancer Medicine Guangzhou China
7. Guangzhou Concord Cancer Center Guangzhou China