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APA Citation
Kempster, P. A., Frankel, J. P., Bovingdon, M., Webster, R., Lees, A. J., & Stern, G. M. (1989). levodopa peripheral pharmacokinetics and duration of motor response in Parkinson's disease.. Journal of neurology, neurosurgery and psychiatry, 52(6), 718–723. http://access.bl.uk/ark:/81055/vdc_100135182352.0x000042