Serum ferritin.
D000293:Adolescent; D000328:Adult; D001803:Blood Transfusion; D002648:Child; D002675:Child, Preschool; D005260:Female; D005293:Ferritins / Q000097:blood*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007249:Inflammation / Q000097:blood; D007501:Iron / Q000378:metabolism; D007938:Leukemia / Q000097:blood; D008107:Liver Diseases / Q000097:blood; D008297:Male
D005293:Ferritins; D007501:Iron