Patients who are planned to have elective living donor transplant within 6 months Patients who are planned to transfer to other renal center within 6 months High likelihood of early withdrawal from the study (e.g. myocardial infarction, severe or unstable coronary disease, stroke, severe liver disease within 3 months) Active infection or systemic inflammatory disease. Current malignant disease Pregnancy or breast-feeding Women of childbearing potential with unreliable birth control methods Known hypersensitivity to thalidomide