AUTHOR=Egan Suhelen , Fukatsu Takema , Francino M. Pilar TITLE=Opportunities and Challenges to Microbial Symbiosis Research in the Microbiome Era JOURNAL=Frontiers in Microbiology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2020.01150 DOI=10.3389/fmicb.2020.01150 ISSN=1664-302X