title: CSF tetrahydrobiopterin levels in patients with affective disorders.
mesh_terms: D001708:Biopterins / Q000031:analogs & derivatives / Q000134:cerebrospinal fluid*; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D019964:Mood Disorders / Q000134:cerebrospinal fluid*; D011621:Pteridines / Q000134:cerebrospinal fluid*
chemical_list: D011621:Pteridines; D001708:Biopterins; C003402:sapropterin