Long-term degenerative changes in aortic segment homografts, with particular reference to calcification.
D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000637:transplantation*; D002114:Calcinosis / Q000000981:diagnostic imaging / Q000209:etiology*; D005500:Follow-Up Studies; D005612:Freeze Drying / Q000009:adverse effects; D006801:Humans; D011309:Preservation, Biological; D011859:Radiography; D014184:Transplantation, Homologous