AUTHOR=Rus Carla P. TITLE=Disruptions in serotonin- and kynurenine pathway metabolism in post-COVID: biomarkers and treatment JOURNAL=Frontiers in Neurology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2025.1532383 DOI=10.3389/fneur.2025.1532383 ISSN=1664-2295