AUTHOR=Ren Bin , Ramchandran Ramani , Yang Xiaofeng TITLE=Editorial: Molecular Mechanisms and Signaling in Endothelial Cell Biology and Vascular Heterogeneity 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.2021.821100 DOI=10.3389/fcell.2021.821100 ISSN=2296-634X