1. Departments of Oncology Xiangya Hospital, Central South University Changsha China
2. National Clinical Research Center for Geriatric Disorders Xiangya Hospital, Central South University Changsha China
3. Department of Neurosurgery The Second Affiliated Hospital of Nanchang University Nanchang China
4. Departments of Neurosurgery Xiangya Hospital, Central South University Changsha China
5. Departments of Neurosurgery Yale School of Medicine New Haven Connecticut USA