WHEN IRON RUNS LOW, FOCUS FADES: ASSOCIATION BETWEEN IRON DEFICIENCY AND CONCENTRATION SPAN AMONG UNDERGRADUATE MEDICAL STUDENTS- A CROSS-SECTIONAL STUDY. Pakistan Journal of Medical & Cardiological Review, [S. l.], v. 5, n. 2, p. 3082–3100, 2026. DOI: 10.66021/pakmcr1106. Disponível em: https://pakjmcr.com/index.php/1/article/view/1106. Acesso em: 11 jul. 2026.