AUTHOR=da Silva Meirelles Lindolfo , Bieback Karen , Bolontrade Marcela F. TITLE=Editorial: Current Progress in Mesenchymal Stem/Stromal Cell Research 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.2021.658903 DOI=10.3389/fcell.2021.658903 ISSN=2296-634X