Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study. AJBR [Internet]. 31. siječanj 2021. [citirano 17. svibanj 2026.];24(1):53-7. Dostupno na: https://ojshostng.com/index.php/ajbr/article/view/1689