1. Department of Medical Imaging Center, State Key Laboratory of Oncology in South China, Collaborate Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy Sun Yat‐sen University Cancer Center Guangzhou China
2. Department of Radiation Oncology, Cancer Center First People's Hospital of Foshan Affiliated to Sun Yat‐sen University Foshan China