title: Serial determinations of homovanillinic acid in the cerebrospinal fluid of Parkinson patients treated with L-dopa.
mesh_terms: D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage* / Q000009:adverse effects; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000134:cerebrospinal fluid* / Q000188:drug therapy; D010648:Phenylacetates / Q000134:cerebrospinal fluid*; D010919:Placebos
chemical_list: D010648:Phenylacetates; D010919:Placebos; D004295:Dihydroxyphenylalanine