Corrigendum: High-Dose Intravenous Immunoglobulin in Severe Coronavirus Disease 2019: A Multicenter Retrospective Study in China - Cao, Wei; Liu, Xiaosheng; Hong, Ke; Ma, Zhiyong; Zhang, Yuelun; Lin, Ling; Han, Yang; Xiong, Yong; Liu, Zhengyin; Ruan, Lianguo; Li, Taisheng (Frontiers in Immunology, 2021)