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APA Citation
Whitehead, A. S., Bertrandy, S., Finnan, F., Butler, A., Smith, G. D., & Ben-Shlomo, Y. (1996). frequency of the apolipoprotein E epsilon 4 allele in a case-control study of early onset Parkinson's disease.. Journal of neurology, neurosurgery and psychiatry, 61(4), 347–351. http://access.bl.uk/ark:/81055/vdc_100135163811.0x000031