title: Alterations in transplanted viable sheep aortic valves in dogs: follow-up studies to 23 months.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000473:pathology / Q000637:transplantation*; D002356:Cartilage; D003239:Connective Tissue Cells; D004285:Dogs; D005347:Fibroblasts; D005500:Follow-Up Studies; D008214:Lymphocytes; D010950:Plasma Cells; D011183:Postoperative Complications; D012756:Sheep; D013530:Surgical Wound Infection; D014181:Transplantation Immunology; D014183:Transplantation, Heterologous