AUTHOR=Meininger Gerald A. , Hill Michael A. TITLE=Frontiers in Vascular Physiology Grand Challenges in Vascular Physiology JOURNAL=Frontiers in Physiology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2020.00852 DOI=10.3389/fphys.2020.00852 ISSN=1664-042X