1. Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, People's Republic of China
2. Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, People's Republic of China
3. Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, People's Republic of China
4. Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China