Facial expressivity in Parkinson's disease: Using the facial action coding system to evaluate Duchenne smiling behavior and the impact of voice treatment upon global expressivity measures at 6-month follow-up

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Title
Facial expressivity in Parkinson's disease: Using the facial action coding system to evaluate Duchenne smiling behavior and the impact of voice treatment upon global expressivity measures at 6-month follow-up
Identifier
d_2009_2013:eb5d6deab144:11931:pdf