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Uptake of dopamine and 5-hydroxytryptamine by platelets of patients with Parkinsonism.
  1. M J Aminoff,
  2. R S Ehsanullah,
  3. P Turner


    The uptake of tritiated dopamine and 5-hydroxytryptamine by platelets from 11 patients with Parkinsonism who were not receiving any medication, and from 11 control subjects matched for sex and for age within a decade was compared. No significant differences were found in the uptake of either amine. Our findings, therefore, provide no support for the belief that there is a generalised defect of dopamine systems in Parkinson's disease.

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