Recipients serum creatinine increased slightly during the first 3 months and then it dropped significantly at 12 months (average serum creatinine at the time of discharge, 1 month, 3 month, 6 month, 12 month respectively: 1.32 ± 0.26 mg / dl; 1.34 ± 0.21 mg / dl, 1.31 ± 0.22 mg / dl; 1, 29 ± 0, 21 mg / dl; p <0, 001).