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APA Citation
Doty, R. L., Stern, M. B., Pfeiffer, C., Gollomp, S. M., & Hurtig, H. I. (1992). bilateral olfactory dysfunction in early stage treated and untreated idiopathic Parkinson's disease.. Journal of neurology, neurosurgery and psychiatry, 55(2), 138–142. http://access.bl.uk/ark:/81055/vdc_100135145178.0x000035