A factor from urine which modulates in vivo erythropoietin activity.
D001681:Biological Assay; D004305:Dose-Response Relationship, Drug; D004921:Erythropoietin / Q000494:pharmacology / Q000652:urine*; D006801:Humans; D007501:Iron / Q000378:metabolism
D004921:Erythropoietin; D007501:Iron