AUTHOR= Frontiers Editorial Office TITLE=Retraction: Overexpressed tumor suppressor exosomal miR-15a-5p in cancer cells inhibits PD1 expression in CD8+T cells and suppresses the hepatocellular carcinoma progression JOURNAL=Frontiers in Oncology VOLUME=14 YEAR=2024 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2024.1388383 DOI=10.3389/fonc.2024.1388383 ISSN=2234-943X