Corrigendum: Hypoxia response element-directed expression of aFGF in neural stem cells promotes the recovery of spinal cord injury and attenuates SCI-induced apoptosis - Ying, Yibo; Zhang, Yifan; Tu, Yurong; Chen, Min; Huang, Zhiyang; Ying, Weiyang; Wu, Qiuji; Ye, Jiahui; Xiang, Ziyue; Wang, Xiangyang; Wang, Zhouguang; Zhu, Sipin (Frontiers in Cell and Developmental Biology, 2022)