AUTHOR=Li Yulu , Zhu Bin , Yang Chun , Miao Liying TITLE=Commentary: Focus on the Gut–Kidney Axis in Health and Disease JOURNAL=Frontiers in Medicine VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2021.669561 DOI=10.3389/fmed.2021.669561 ISSN=2296-858X