Patients were divided into three groups : Controls , no CRF or ESRD , n=748 ; CRF , sustained serum creatinine > 2.5 mg/dl , n=41 ; and ESRD , n=45 .
B-OrganismTaxon O O O O O O O O O B-DiseaseOrPhenotypicFeature O B-DiseaseOrPhenotypicFeature O O O B-DiseaseOrPhenotypicFeature O O O B-ChemicalEntity O O O O O O O B-DiseaseOrPhenotypicFeature O O O