AUTHOR=Liu Xijian , Jiang Yanyan , Cai Pingqiang , Gao Ruixia TITLE=Editorial: Advanced Silica Nanomaterials for Drug Delivery JOURNAL=Frontiers in Chemistry VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.677647 DOI=10.3389/fchem.2021.677647 ISSN=2296-2646