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APA Citation
Piatkowski, R., Kochanowski, J., Budnik, M., Peller, M., Grabowski, M., & Opolski, G. (n.d.). stress echocardiography in patients with ischemic mitral regurgitation and left ventricular dysfunction qualified to cardiosurgery treatment. European heart journal, 23, . http://access.bl.uk/ark:/81055/vdc_100150542271.0x00003d