1. Department of Neurosurgery, Affiliated Navy Clinical College of Anhui Medical University, Beijing, P.R. China.
2. Department of Neurosurgery, Chinese PLA General Hospital—Sixth Medical Center, Beijing, P.R. China.
3. Department of Neurology, Beijing Hospital, National Center of Gerontology, Beijing, P.R. China.
4. Department of Biotherapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin, P.R. China.
5. State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, P.R. China.
6. Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China.