AUTHOR=Günther Juliane , Fallarino Francesca , Fuchs Dietmar , Wirthgen Elisa TITLE=Editorial: Immunomodulatory Roles of Tryptophan Metabolites in Inflammation and Cancer JOURNAL=Frontiers in Immunology VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2020.01497 DOI=10.3389/fimmu.2020.01497 ISSN=1664-3224