Abubakar, F.I. et al. 2025. 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. 3, 1 (Sep. 2025), 1–11. DOI:https://doi.org/10.82222/njcd.vol3no1.35.