1. Cancer Research Institute, Xiang‐Ya School of Medicine, Central South University, Changsha, Hunan, People's Republic of China
2. Regenerative Medicine Research Institute, Yunyang Medical College Tai‐he Hospital, Shiyan, Hubei, People's Republic of China
3. Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China