Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study. AJBR [Internet]. 31. januar 2021 [henvist 6. april 2026];24(1):53-7. Tilgængelig hos: https://www.ojshostng.com/index.php/ajbr/article/view/1689