Oei, F.B.S.

valve allograft aortic donor graft patient study transplantation antigen implantation rejection heart valve allografts blood frequency tissue response class recipient allogeneic cryopreserved thorac result model analysis aortic valve allografts leaflet increase lymphocytes failure factor homograft cytotoxic dendritic cells chapter cardiovasc syngeneic donor-specific molecule antibody spleen avidity group month graft rejection degeneration transplant helper dysfunction valve allograft implantation presence animal activation donor antigens infiltration cytotoxic t lymphocytes valve allograft recipients htlpf table effect replacement risk factors number cryopreservation difference dendritic conduit blood samples 12 months histological adult method period immunogenicity organ valve leaflets fraction figure dilution vaessen