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Showing articles 0 to 2 of 2 Filter Applied: Parkinson disease,progression (Click to remove) Diagnosis and Treatment of Parkinson Disease JAMA 323:548-560, Armstrong, M.J. & Okun, M.S., 2020 Progression of Parkinson's Disease Without Levodopa Neurol 37:695-698, Coetz,C.G.,et al, 1987 Showing articles 0 to 2 of 2