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APA Citation
Pedersen, W. R., Goldenberg, I. F., Pedersen, C. W., Lesser, A., Harris, K. M., Lesser, J. R., Garberich, R. F., Schwartz, J. G., Shank, E., & Schwartz, R. S. (n.d.). balloon aortic valvuloplasty in high risk aortic stenosis patients with left ventricular ejection fractions <20%. Catheterization and cardiovascular interventions, 84(5), 824–831. http://access.bl.uk/ark:/81055/vdc_100024977265.0x00005c