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APA Citation
Frankel, J. P., Kempster, P. A., Bovingdon, M., Webster, R., Lees, A. J., & Stern, G. M. (1989). the effects of oral protein on the absorption of intraduodenal levodopa and motor performance.. Journal of neurology, neurosurgery and psychiatry, 52(9), 1063–1067. http://access.bl.uk/ark:/81055/vdc_100135553043.0x000037