Transplantation: the problem of limited resources.
D006291:Health Policy; D016027:Heart Transplantation; D006801:Humans; D007359:Insurance, Surgical / Q000331:legislation & jurisprudence; D016030:Kidney Transplantation; D007883:Legislation, Medical; D016031:Liver Transplantation; D014019:Tissue Donors; D014184:Transplantation, Homologous / Q000191:economics; D014481:United States