
Keywords: Kyn; kynurenine; Trp; tryptophan; Phe; phenylalanine; Tyr; tyrosine; GCH-1; guanosine triphosphate cyclohydrolase I; IDO-1; indolamine 2,3-dioxygenase; PAH; phenylalanine 4-hydroxylase; NOS; nitric oxide synthases; NO; nitric oxide; CGA; comprehensive ger