Tariq Atta, Yamama, and Shahla Karim Alalaf. “Severe Maternal Vitamin D Deficiency During Labor and Its Correlation With Umbilical Cord Vitamin D Level”. Zanco Journal of Medical Sciences (ZJMS) 29, no. 1 (April 23, 2025): 118–125. Accessed April 5, 2026. https://zjms.hmu.edu.krd/index.php/zjms/article/view/1032.