title: A five-year study of viable aortic valve homografts.
mesh_terms: D001021:Aortic Valve / Q000637:transplantation*; D002470:Cell Survival; D005500:Follow-Up Studies; D006349:Heart Valve Diseases / Q000601:surgery; D006350:Heart Valve Prosthesis; D006351:Heart Valves / Q000166:cytology / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D011379:Prognosis; D014021:Tissue Preservation; D014184:Transplantation, Homologous