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APA Citation
Simuni, T., Caspell-Garcia, C., Coffey, C. S., Weintraub, D., Mollenhauer, B., Lasch, S., Tanner, C. M., Jennings, D., Kieburtz, K., Chahine, L. M., & Marek, K. (2018). baseline prevalence and longitudinal evolution of non-motor symptoms in early Parkinson's disease: the PPMI cohort. Journal of neurology, neurosurgery and psychiatry, 89(1), 78–88. http://access.bl.uk/ark:/81055/vdc_100135151356.0x00002c