title: Invited letter concerning: stentless porcine aortic bioprosthesis.
authors.forename: W W
authors.initials: WW
authors.lastname: Angell
mesh_terms: D000818:Animals; D001021:Aortic Valve; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006801:Humans; D011474:Prosthesis Design