1. Department of Radiation Oncology Shandong Cancer Hospital and Institute Cheeloo College of Medicine Shandong University Jinan Shandong 250012 P. R. China
2. Shandong Key Laboratory of Brain Functional Remodeling Jinan Shandong 250012 P. R. China
3. Department of Neurosurgery Qilu Hospital of Shandong University Cheeloo College of Medicine Shandong University Jinan Shandong 250012 P. R. China
4. Department of Radiation Oncology Qilu Hospital of Shandong University Cheeloo College of Medicine Shandong University Jinan Shandong 250012 P. R. China
5. Department of Neurosurgery the Second Affiliated Hospital of Zhejiang University School of Medicine Hangzhou Zhejiang 310000 P. R. China
6. Department of Neurology Loma Linda University Health Loma Linda CA 92354 USA
7. Key Laboratory for Experimental Teratology of Ministry of Education and Department of Immunology Shandong University School of Medicine Jinan Shandong 250012 P. R. China
8. Department of Biomedicine University of Bergen Bergen 5009 Norway