title: Late thrombotic obstruction of aortic porcine bioprostheses.
mesh_terms: D001021:Aortic Valve; D001705:Bioprosthesis / Q000009:adverse effects*; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D013927:Thrombosis / Q000209:etiology*