Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study. AJBR [Internet]. 2021(e)ko urtarrilaren 31(e)an [aipatua 2026(e)ko apirilaren 5(e)an];24(1):53-7. Available at: https://ojshostng.com/index.php/ajbr/article/view/1689