1. Department of Radiation Oncology, Guangxi Medical University Cancer Hospital, Nanning 530021, Guangxi, China
2. Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning 530021, Guangxi, China
3. Guangxi Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor, Guangxi Medical University, Nanning 530021, Guangxi, China