AUTHOR=Xie Xiaojiang , Citterio Daniel , Chumbimuni-Torres Karin , Xue Min , Wang Xudong TITLE=Editorial: Chemical Sensors for Biomedical Use JOURNAL=Frontiers in Chemistry VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.685563 DOI=10.3389/fchem.2021.685563 ISSN=2296-2646