1. Department of Neurosurgery, Heilongjiang Provincial Hospital, Harbin, China.
2. Department of Pediatrics, Qingdao Huangdao District Central Hospital, Qingdao, China.
3. Department of Infectious Disease Prevention and Control, Qingdao West Coast New Area Disease Prevention and Control Center, Qingdao, China.
4. Department of Neurology, The Second Hospital of Harbin, Harbin, China.
5. Clinical Laboratory, Heilongjiang Provincial Hospital, Harbin, China.
6. Department of Geriatric Neurology, Heilongjiang Provincial Hospital, Harbin, China.