AUTHOR=Ragni Enrico , Parolini Ornella , Silini Antonietta Rosa TITLE=Editorial: MSC-Derived Extracellular Vesicles and Secreted Factors as “Cell-Free” Therapeutic Alternatives in Regenerative Medicine JOURNAL=Frontiers in Bioengineering and Biotechnology VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2022.842128 DOI=10.3389/fbioe.2022.842128 ISSN=2296-4185