Organ transplantation.
D006084:Graft Rejection; D016027:Heart Transplantation; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007165:Immunosuppression Therapy; D016030:Kidney Transplantation; D016031:Liver Transplantation; D014184:Transplantation, Homologous / Q000266:history