ABUBAKAR, F. I.; GARBA, B. I.; HAMIDU, A; NMA, J. M.; AHMED, H. K. Serum Vitamin D Levels Amongst Asthmatic and Non-Asthmatic Children in Usmanu Danfodiyo University Teaching Hospital, Sokoto, Nigeria: A Comparative Cross-Sectional Study. Nigerian Journal of Chest Diseases, Nigeria, v. 3, n. 1, p. 1–11, 2025. DOI: 10.82222/njcd.vol3no1.35. Disponível em: https://njcd.nigerianthoracicsociety.org.ng/index.php/home/article/view/35. Acesso em: 9 nov. 2026.