 This observational study will evaluate the efficacy and use of Methoxy polyethylene glycol-epoetin beta Mircera in participants with Stage V chronic kidney disease on hemodialysis receiving an erythropoietin prior to study entry. Attending physicians should have made the decision of placing the participant on methoxy polyethylene glycol epoetin beta in advance and not related to the study. The therapy will be administered by the attendant treating physician according to specifications in the package insert guidelines and to the routine of the site. 