AUTHOR=Xiao Tangxin , Elmes Robert , Yao Yong TITLE=Editorial: Host-Guest Chemistry of Macrocycles JOURNAL=Frontiers in Chemistry VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.628200 DOI=10.3389/fchem.2020.628200 ISSN=2296-2646