GSTM1 and chronic kidney disease: These changes were completely corrected by rEPO treatment: Hb 13.3 vs. 17.8 g/dL, EC 8.8 vs. 6.7 × 106/μL, Htc 41.3 vs. 58.2%; in all cases, P < 0.05 (Ad-CKD vs. Ad-CKD+rEPO).