1. Key Laboratory of Stem Cells and Tissue Engineering Sun Yat‐Sen University Ministry of Education 510080 Guangzhou China
2. Medical Research Institute Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences Southern Medical University 510080 Guangzhou China
3. Guangdong Cardiovascular Institute Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences 510080 Guangzhou China
4. Department of Neurosurgery in Xiangya Hospital Central South University 410008 Changsha China
5. Department of Pathology in Xiangya Hospital Central South University Changsha 410008 China
6. Department of Neurosurgery Hunan Children's Hospital Changsha 410007 China