title: Heterograft aortic valves for human valve disease.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000637:transplantation*; D002417:Cattle; D006349:Heart Valve Diseases / Q000601:surgery*; D006801:Humans; D013552:Swine; D014183:Transplantation, Heterologous