Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study. AJBR [Интернет]. 31 январь 2021 г. [цитируется по 21 май 2026 г.];24(1):53-7. доступно на: https://www.ojshostng.com/index.php/ajbr/article/view/1689