Abubakar FI, Garba BI, Hamidu A, Nma JM, Ahmed HK. Serum Vitamin D Levels Amongst Asthmatic and Non-Asthmatic Children in Usmanu Danfodiyo University Teaching Hospital, Sokoto, Nigeria: A Comparative Cross-Sectional Study. NJCD [Internet]. 2025 Sep. 19 [cited 2026 Mar. 29];3(1):1-11. Available from: https://njcd.nigerianthoracicsociety.org.ng/index.php/home/article/view/35