GSTM1 and anemia (phenotype): Despite significant improvement in the last few years, recent surveys, such as the European Survey in Anaemia Management (ESAM) 2003 [7] and the Dialysis Outcomes and Practice Pattern Study II (DOPPS II) [8], show that the minimal haemoglobin (Hb) target of 11 g/dL, proposed by the European Best Practice Guidelines (EBPG) [9] and the Kidney Disease Outcomes Quality Initiative (K/DOQI) [10], was not achieved in many patients.