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Parkinson's disease: early diagnosis and management.

Parkinson's disease is a common neurodegenerative disorder affecting approximately 1% of the population over the age of 50 years. There is no known cure for Parkinson's disease, but research gains over the last two decades have been substantial, resulting in improved medications and therapeutic strategies for managing early symptoms and delaying the onset of serious disability. Particularly promising is current research suggesting the possibility of neuroprotective therapies that may ultimately be capable of slowing disease progression. Early and accurate diagnosis is especially important to optimize the benefits of new therapies.