AUTHOR=Huang Xuan , Reye Gina , Momot Konstantin I. , Blick Tony , Lloyd Thomas , Tilley Wayne D. , Hickey Theresa E. , Snell Cameron E. , Okolicsanyi Rachel K. , Haupt Larisa M. , Ferro Vito , Thompson Erik W. , Hugo Honor J. TITLE=Corrigendum: Heparanase Promotes Syndecan-1 Expression to Mediate Fibrillar Collagen and Mammographic Density in Human Breast Tissue Cultured ex vivo 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.2021.678589 DOI=10.3389/fcell.2021.678589 ISSN=2296-634X