title: The determination of picogram levels of 5-HT in biological fluids.
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D002415:Cats; D002421:Caudate Nucleus / Q000032:analysis; D002850:Chromatography, Gel / Q000379:methods; D008832:Microchemistry; D012701:Serotonin / Q000032:analysis* / Q000134:cerebrospinal fluid
chemical_list: D012701:Serotonin