AUTHOR= Frontiers Editorial Office TITLE=Retraction: Downregulation of hsa_circ_0001836 Induces Pyroptosis Cell Death in Glioma Cells via Epigenetically Upregulating NLRP1 JOURNAL=Frontiers in Oncology VOLUME=11 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.840877 DOI=10.3389/fonc.2021.840877 ISSN=2234-943X