title: Mechanism of tolerance in rat liver transplantation: evidence for the existence of suppressor cells.
mesh_terms: D000818:Animals; D006085:Graft Survival; D016027:Heart Transplantation; D007108:Immune Tolerance; D007116:Immunization, Passive; D007700:Kinetics; D016031:Liver Transplantation; D051381:Rats; D011919:Rats, Inbred Strains; D016038:Skin Transplantation; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*