| http://www.w3.org/ns/prov#value | - Exclusion criteria Patients with hemoglobinopathy, anemia due to causes other than CKD as hemolytic anemia, patients who had a history of overt blood loss or who received a blood transfusion four months prior to the study, patients with evidence of hyporvitaminosis C (Scurvy), evidence of hepatic disorders, inflammatory disease or thyroid disease, patients with heavy proteinuria or taking steroid
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