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Fatigue and excessive daytime sleepiness in idiopathic Parkinson’s disease differently correlate with motor symptoms, depression and dopaminergic treatment

Background and purpose:  A comprehensive study of both fatigue and excessive daytime sleepiness (EDS) in association with Parkinson’s disease (PD)‐related symptoms and treatment has not been performed yet. To assess the frequency and severity of fatigue and EDS in patients with idiopathic PD and to study their relation to motor and non‐motor symptoms and dopaminergic treatment.