Elsevier, Parkinsonism & Related Disorders, (25), p. 65-71, 2016
DOI: 10.1016/j.parkreldis.2016.02.006
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The temporal relationship between disease and disability progression in Parkinson disease (PD) is not well understood. Our objective was to describe the natural, multidimensional trajectory of disability in persons with PD over a two-year period.