Valvular xenograft and valvular xenobioprosthesis: past, present, future.
D000818:Animals; D001021:Aortic Valve / Q000637:transplantation*; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006801:Humans; D013552:Swine; D014183:Transplantation, Heterologous