“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, vol. 5, no. 2, May 2026, pp. 3082-00, https://doi.org/10.66021/pakmcr1106.