1. Rajaie G. Analysis for Policy-Making to Optimize Blood Vitamin A Levels in Iranian Children Aged 15-23 Months. Tehran, Iran: Shahid Beheshti University of Medical Sciences; 2020.

2. Pouraram H, Djazayery A, Mohammad K, Parsaeian M, Abdollahi Z, Dorosty Motlagh A, et al. Second National Integrated Micronutrient Survey in Iran: Study Design and Preliminary Findings. Arch Iran Med. 2018;21(4):137-44.

3. UNICEF. Vitamin A Deficiency in Children: Global Nutrition Database. 2024.

4. Our World in D. Share of children receiving vitamin A supplementation. 2026.

5. Bjelakovic G. Effects of primary or secondary prevention with vitamin A supplementation on clinically important outcomes. BMJ Open. 2024;14(5). [DOI:10.1136/bmjopen-2023-078053]

6. FAO, IFAD, UNICEF, WFP, WHO. The State of Food Security and Nutrition in the World (SOFI) 2025: Addressing high food price inflation for food security and nutrition. Rome: FAO; 2025.

7. Stevens GA. Micronutrient deficiencies among preschool-aged children and women of reproductive age worldwide. The Lancet Global Health. 2022;10(11): e1590-e9. [DOI:10.1016/S2214-109X(22)00367-9]

8. Kere N, Compaore EWR, Ouedraogo O, Ky I, Bambara EA, Tirogo S, et al. Dietary intake and vitamin A deficiency among children aged 6 to 23 months in the Province of Sanmatenga, Burkina Faso. BMC Nutr. 2026;12(1). [DOI:10.1186/s40795-026-01254-y]

9. Walt G, Gilson L. Reforming the health sector in developing countries: the central role of policy analysis. Health Policy and Planning. 1994;9(4):353-70. [DOI:10.1093/heapol/9.4.353]