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APA Citation
Wardlaw, J. M., Lewis, S. C., Humphrey, P., Young, G., Collie, D., & Warlow, C. P. (2001). how does the degree of carotid stenosis affect the accuracy and interobserver variability of magnetic resonance angiography?. Journal of neurology, neurosurgery and psychiatry, 71(2), 155–160. http://access.bl.uk/ark:/81055/vdc_100135155073.0x000033