1. Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.
2. Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.
3. Key Laboratory of Post-Trauma Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.
4. Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China.
5. Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.
6. Department of Neurology, Duke University Medical Center, Durham, North Carolina.