AUTHOR=Mondanelli Giada , Iacono Alberta , Allegrucci Massimo , Puccetti Paolo , Grohmann Ursula TITLE=Immunoregulatory Interplay Between Arginine and Tryptophan Metabolism in Health and Disease JOURNAL=Frontiers in Immunology VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2019.01565 DOI=10.3389/fimmu.2019.01565 ISSN=1664-3224