title: Failure of Hancock pericardial bioprostheses.
authors.forename: V M
authors.initials: VM
authors.lastname: Walley
authors.forename: W
authors.initials: W
authors.lastname: Keon
mesh_terms: D001021:Aortic Valve; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve; D011475:Prosthesis Failure