AUTHOR=Wadowski Patricia P. , Jilma Bernd , Kopp Christoph W. , Ertl Sebastian , Gremmel Thomas , Koppensteiner Renate TITLE=Glycocalyx as Possible Limiting Factor in COVID-19 JOURNAL=Frontiers in Immunology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2021.607306 DOI=10.3389/fimmu.2021.607306 ISSN=1664-3224