title: Melatonin in human cerebrospinal fluid in daytime; its origin and variation with age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D005260:Female; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000134:cerebrospinal fluid; D008297:Male; D008550:Melatonin / Q000134:cerebrospinal fluid*; D008875:Middle Aged; D013997:Time Factors; D014364:Tryptophan / Q000134:cerebrospinal fluid
chemical_list: D006897:Hydroxyindoleacetic Acid; D014364:Tryptophan; D008550:Melatonin