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Parkinson disease is a neurodegenerative disorder caused by substantia nigra dopamine cell death and is characterized by bradykinesia, rigidity, rest tremor, and postural instability. Epidemiologic and clinical studies have suggested that gender and estrogen play a role in modulating Parkinson disease. The etiology of the estrogenic effect is unclear—it may be neuroprotective, symptomatic, or both...
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