Fig. 1From: Effect of oral and intravenous iron therapy on hemoglobin levels in hemodialysis patients according to serum ferritin levelStudy design. No patients had been given either iron or blood transfusions for more than 3 months before entry, and continuous erythropoietin receptor activator (C.E.R.A.) or darbepoetin alfa was administered every 2 weeks and every week, respectivelyBack to article page