Cite
MLA Citation
I A Simpson et al.. “Non-invasive assessment by Doppler ultrasound of 155 patients with bioprosthetic valves: a comparison of the Wessex porcine, low profile Ionescu-Shiley, and Hancock pericardial bioprostheses..” Heart, vol. 56, no. 1, 1986, pp. 83–88. http://access.bl.uk/ark:/81055/vdc_100144733413.0x00002d