AUTHOR=Castell Margarida , Walton Gemma E. , PĂ©rez-Cano Francisco J. TITLE=Editorial: Beyond Probiotics: Dietary Microbial Modulators of the Immune System - Effects and Mechanisms JOURNAL=Frontiers in Nutrition VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.852086 DOI=10.3389/fnut.2022.852086 ISSN=2296-861X