1. Department of Neurosurgery, Tianjin Medical University General Hospital , Tianjin, China
2. Key Laboratory of Post Neuro-injury Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Ministry of Education , Tianjin, China
3. Department of Neurology, The First Affiliated Hospital of China Medical University , Shenyang, China