AUTHOR=Liao Danying , Li Huaibiao TITLE=Corrigendum: Dissecting the Niche for Alveolar Type II Cells With Alveolar Organoids JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2021.684641 DOI=10.3389/fcell.2021.684641 ISSN=2296-634X