1. Department of Neurosurgery Xiangya Hospital Central South University Changsha Hunan China
2. Diagnosis and Treatment Center for Hydrocephalus Xiangya Hospital Central South University Changsha Hunan China
3. National Clinical Research Center for Geriatric Disorders Xiangya Hospital Central South University Changsha Hunan China
4. Department of Pediatric Neurosurgery Xinhua Hospital Shanghai Jiaotong University School of Medicine Shanghai China
5. Department of Neurosurgery Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine Central South University Changsha Hunan China