Corrigendum: Long-Term Risk Factors for Intracranial In-Stent Restenosis From a Multicenter Trial of Stenting for Symptomatic Intracranial Artery Stenosis Registry in China - Guo, Xu; Ma, Ning; Gao, Feng; Mo, Da-Peng; Luo, Gang; Miao, Zhong-Rong (Frontiers in Neurology, 2021)