title: Long-term preservation of fresh viable aortic valve homografts by freezing.
mesh_terms: D001021:Aortic Valve / Q000033:anatomy & histology / Q000637:transplantation*; D001345:Autoradiography; D005347:Fibroblasts / Q000378:metabolism; D005615:Freezing; D006801:Humans; D008938:Mitosis; D009584:Nitrogen; D013696:Temperature; D013936:Thymidine; D013997:Time Factors; D014021:Tissue Preservation; D014184:Transplantation, Homologous; D014316:Tritium
chemical_list: D014316:Tritium; D009584:Nitrogen; D013936:Thymidine