Corrigendum: MicroRNA Let-7i Is a Promising Serum Biomarker for Post-stroke Cognitive Impairment and Alleviated OGD-Induced Cell Damage in vitro by Regulating Bcl-2 - Wang, Zhan-Qiang; Li, Kuo; Huang, Jie; Huo, Tian-Tian; Lv, Pei-Yuan (Frontiers in Neuroscience, 2021)