Impaired erythropoiesis.
D000293:Adolescent; D000328:Adult; D000740:Anemia / Q000175:diagnosis* / Q000209:etiology; D000747:Anemia, Hypochromic / Q000175:diagnosis; D000748:Anemia, Macrocytic / Q000175:diagnosis; D001772:Blood Cell Count; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004920:Erythropoiesis; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D013789:Thalassemia / Q000175:diagnosis; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis