1. Key Laboratory for Stem Cells and Tissue Engineering Ministry of Education Sun Yat‐sen University Guangzhou China
2. Department of Histology and Embryology Zhongshan School of Medicine Sun Yat‐sen University Guangzhou China
3. Guangdong Provincial Key Laboratory of Brain Function and Disease Zhongshan School of Medicine Sun Yat‐sen University Guangzhou China
4. Co‐innovation Center of Neuroregeneration Nantong University Nantong China
5. Department of Acupuncture The 1st Affiliated Hospital Sun Yat‐sen University Guangzhou China
6. Department of Electron Microscope Zhongshan School of Medicine Sun Yat‐sen University Guangzhou China
7. Institute of Spinal Cord Injury Sun Yat‐sen University Guangzhou China