title: Prolongation of organ allograft survival by syngeneic lymphoid cells.
mesh_terms: D000818:Animals; D006085:Graft Survival; D016027:Heart Transplantation; D008214:Lymphocytes / Q000276:immunology*; D051381:Rats; D011914:Rats, Inbred BN; D011917:Rats, Inbred Lew; D013997:Time Factors; D014184:Transplantation, Homologous