[Ma, J.; Sun, Y.; Xie, F. -Y.; Hua, W. -H.; Guo, L.; Mo, H. -Y.; Chen, L.; Li, W. -F.; Liu, M. -Z.] Sun Yat Sen Univ, State Key Lab Oncol South China, Dept Radiat Oncol, Ctr Canc, Guangzhou 510275, Guangdong, Peoples R China; [Chen, N. -Y.] Sichuan Univ, Dept Oncol, West China Hosp, Chengdu 610064, Peoples R China; [Zhang, N.] First Peoples Hosp Foshan, Dept Radiat Oncol, Foshan, Peoples R China; [Hu, G. -Q.] Huazhong Univ Sci & Technol, Dept Oncol, Tongji Hosp, Tongji Med Coll, Wuhan 430074, Peoples R China; [Sun, Y.] Peking Univ, Dept Radiat Oncol, Sch Oncol, Beijing 100871, Peoples R China; [Chen, X. -Z.] Zhejiang Canc Hosp, Dept Radiat Oncol, Hangzhou, Zhejiang, Peoples R China; [Li, J. -G.] Jiangxi Canc Hosp, Dept Radiat Oncol, Nanchang, Peoples R China; [Zhu, X. -D.] Guangxi Med Univ, Dept Radiat Oncol, Canc Hosp, Nanchang, Peoples R China; [Hu, C. -S.] Fudan Univ, Dept Radiat Oncol, Shanghai Canc Ctr, Shanghai 200433, Peoples R China; [Xu, X. -Y.] Harbin Med Univ, Dept Radiat Oncol, Affiliated Hosp 3, Harbin, Peoples R China; [Guo, Y.] Sun Yat Sen Univ, Ctr Canc, Clin Trials Ctr, Guangzhou 510275, Guangdong, Peoples R China