THE IMPORTANCE OF FERRITIN ANALYSIS IN DETERMINING HIDDEN IRON DEFICIENCY ANEMIA IN CHILDREN UNDER 3-7 YEARS OF AGE. MEDICINE, PEDAGOGY AND TECHNOLOGY: THEORY AND PRACTICE, [S. l.], v. 2, n. 5, p. 282–287, 2024. Disponível em: https://www.universalpublishings.com/index.php/mpttp/article/view/5674. Acesso em: 15 nov. 2026.