Agarwal, Neha, and Preeti Tandon. “Incidence of Vitamin D Levels in Cord Blood of Newborns and Correlation With Maternal Vitamin D”. International journal of health sciences 5, no. S1 (December 27, 2021): 687–692. Accessed August 18, 2024. https://sciencescholar.us/journal/index.php/ijhs/article/view/14111.