AUTHOR= Frontiers Editorial Office TITLE=Retraction: MicroRNA-27 Inhibits Autophagy and Promotes Proliferation of Multiple Myeloma Cells by Targeting the NEDD4/Notch1 Axis JOURNAL=Frontiers in Oncology VOLUME=11 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.840086 DOI=10.3389/fonc.2021.840086 ISSN=2234-943X