Vitamin A deficiency and iron nutriture.
D002675:Child, Preschool; D006166:Guatemala; D006801:Humans; D007223:Infant; D007501:Iron / Q000097:blood*; D008137:Longitudinal Studies; D012177:Retinol-Binding Proteins / Q000032:analysis; D014168:Transferrin / Q000097:blood; D014801:Vitamin A / Q000097:blood / Q000627:therapeutic use*; D014802:Vitamin A Deficiency / Q000628:therapy*
D012177:Retinol-Binding Proteins; D014168:Transferrin; D014801:Vitamin A; D007501:Iron