Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army,Department of neurosurgery,Changzheng Hospital,Second Military Medical University,The Institute of neurosurgery of shanghai.,The Institute of neurosurgery of China People's Liberation Army