AUTHOR=Cao Jun , Zhang Mengdi , Wang Bin , Zhang Long , Zhou Fangfang , Fang Meiyu TITLE=Corrigendum: Chemoresistance and Metastasis in Breast Cancer Molecular Mechanisms and Novel Clinical Strategies JOURNAL=Frontiers in Oncology VOLUME=11 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.745052 DOI=10.3389/fonc.2021.745052 ISSN=2234-943X