RT Journal Article SR Electronic T1 Evolution and results of aortic valve surgery, and a ‘disruptive’ technology JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 802 OP 804 VO 75 IS 11 A1 Svensson, Lars G. YR 2008 UL http://www.ccjm.org/content/75/11/802.abstract AB