An Observational Study of Hemoglobin Stability in Chronic Kidney Disease Patients on Dialysis Treated With Mircera (Methoxy Polyethylene Glycol-epoetin Beta)

Inclusion Criteria: * Adult patients, \>/= 18 years of age * Chronic kidney disease patients on hemodialysis or hemodiafiltration for at least 3 months * Previously treated with an erythropoietin stimulating agent (ESA) * Patient for whom the investigator decided to initiate treatment with Mircera for medical reasons * Last hemoglobin level before initiation of Mircera within the range of 10-12 g/dL Exclusion Criteria: * Current participation in a clinical trial on renal anemia