AUTHOR=Coppens Violette , Verkerk Robert , Morrens Manuel TITLE=Tracking TRYCAT: A Critical Appraisal of Kynurenine Pathway Quantifications in Blood JOURNAL=Frontiers in Pharmacology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2022.825948 DOI=10.3389/fphar.2022.825948 ISSN=1663-9812