Ineffective erythropoiesis.
D000293:Adolescent; D000328:Adult; D000740:Anemia / Q000151:congenital* / Q000209:etiology / Q000235:genetics / Q000276:immunology / Q000473:pathology / Q000628:therapy; D001803:Blood Transfusion; D001853:Bone Marrow / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D004920:Erythropoiesis; D005260:Female; D006801:Humans; D006965:Hyperplasia; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy