State Key Laboratory of Oncology in South China;
Oepartment of Neurosurgery;
Department of Pathology;
Department of Radiation Oncology;
Sun Yat-sen University Cancer Center;
Guangzhou;
Guangdong 510060;
P. R. China;
Department of Neurosurgrey;
Zhongnan Hospital;
Wuhan University;
Wuhan;
Hubei 430077. P. R. China.;