title: Cerebral blood flow in Parkinson's syndrome.
mesh_terms: D000368:Aged; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D010302:Parkinson Disease, Secondary / Q000188:drug therapy / Q000503:physiopathology*; D014980:Xenon Radioisotopes
chemical_list: D014980:Xenon Radioisotopes; D007980:Levodopa