AUTHOR=Zelante Teresa , Iannitti Rossana Giulietta , Fallarino Francesca , Gargaro Marco , De Luca Antonella , Moretti Silvia , Bartoli Andrea , Romani Luigina TITLE=Tryptophan Feeding of the IDO1-AhR Axis in Host–Microbial Symbiosis JOURNAL=Frontiers in Immunology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2014.00640 DOI=10.3389/fimmu.2014.00640 ISSN=1664-3224