“…1 Many attempts have been made to decrease rejection after transplantation adding antithymocyte globulin to the conventional dose of 200 mg/kg cyclophosphamide, 2 or total body irradiation at 300 cGy in one day 3 or low dose of busulfan 4 mg/kg in one day. 4 All these regimens have been proven to decrease rejection in patients who had been submitted to transplantation.…”