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Apathy is a behavioural disturbance occurring alone or in concomitance with depression in Parkinson’s disease (PD). Here we present a validation study for the self-report version of the Apathy Evaluation Scale (AES-S), carried out in a sample of 60 non-demented, non-depressed untreated, drug-naïve, de novo PD patients; 20 patients of the sample (33.3 %) were classified as apathetic according to current...
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