Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study. African Journal of Biomedical Research, [S. l.], v. 24, n. 1, p. 53–57, 2021. Disponível em: https://ojshostng.com/index.php/ajbr/article/view/1689. Acesso em: 5 4月. 2026.