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Cerebrospinal fluid (CSF) homovanillic acid (HVA), cyclic adenosine 3', 5'-monophosphate (cAMP), and serum prolactin were measured in schizophrenic male patients with tardive dyskinesia (TD) and in those exhibiting the symptoms of chronic neuroleptic parkinsonism (P). The patients (nine TD and eight P) were chronic paranoid schizophrenics. Levels of HVA in(More)
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