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APA Citation
Kennon, S., Price, C. P., Mills, P. G., MacCallum, P. K., Cooper, J., Hooper, J., Clarke, H., & Timmis, A. D. (2003). cumulative risk assessment in unstable angina: clinical, electrocardiographic, autonomic, and biochemical markers. Heart, 89(1), 36–41. http://access.bl.uk/ark:/81055/vdc_100135174135.0x000014