CSF neopterin, quinolinic acid and kynurenine/tryptophan ratio are biomarkers of active neuroinflammation. - Yan J; Kothur K; Mohammad S; Chung J; Patel S; Jones HF; Keating BA; Han VX; Webster R; Ardern-Holmes S; Antony J; Menezes MP; et al. (EBioMedicine, 2023)