Anaemia is a risk factor for death, cardiac-cerebrovascular events and poor quality of life in patients with chronic kidney disease (CKD). Erythropoietin Stimulating Agents (ESA) are the most used treatment option. In observational studies higher haemoglobin (Hb) levels (around 10-13 g/dL) are associated with improved survival and quality of life compared to lower Hb levels (around 9 g/dL). Randomized studies have found that higher Hb targets, achieved and maintained with ESA, cause an increased risk of death, mainly due to adverse cardiac-cerebrovascular outcomes. It is possible that such effect is mediated by ESA dose. This hypothesis has not been formally tested and is the aim of the Clinical Evaluation of the DOSe of Erythropoietins (CEDOSE) trial.