AUTHOR= Frontiers Editorial Office TITLE=Retraction: Mechanisms of M2 Macrophage-Derived Exosomal Long Non-coding RNA PVT1 in Regulating Th17 Cell Response in Experimental Autoimmune Encephalomyelitis JOURNAL=Frontiers in Immunology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2021.773900 DOI=10.3389/fimmu.2021.773900 ISSN=1664-3224