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APA Citation
Leyva, F., Foley, P. W. X., Stegemann, B., Ward, J. A., Ng, L. L., Frenneaux, M. P., Regoli, F., Smith, R. E. A., & Auricchio, A. (2009). development and validation of a clinical index to predict survival after cardiac resynchronisation therapy. Heart, 95(19), 1619–1625. http://access.bl.uk/ark:/81055/vdc_100137793306.0x00001b