“Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study” (2021) African Journal of Biomedical Research, 24(1), p. 53–57. Disponível em: https://ojshostng.com/index.php/ajbr/article/view/1689 (Acesso em: 27 junho 2026).