[1] Univ South China, Affiliated Nanhua Hosp, Hengyang Med Sch, Dept Oncol, Hengyang, Peoples R China
[2] Xiangya Changde Hosp, Oncol Dept, Changde, Peoples R China
[3] Brain Hosp Hunan Prov, Oncol Dept, Changsha, Peoples R China
[4] Univ South China, Affiliated Hosp 1, Hengyang Med Sch, Oncol Dept, Hengyang, Peoples R China
[5] Cent South Univ, Xiangya Hosp, Dept Neurosurg, Changsha, Peoples R China
[6] Peoples Hosp Changshou Chongqing, Chongqing, Peoples R China
[7] Univ South China, Affiliated Nanhua Hosp, Hengyang Med Sch, Dept Oncol, 336 Dong Feng South Rd, Hengyang 421002, Peoples R China