Saeed, Shaymaa Qais, and Sherzad Abdulahad Shabu. “Knowledge and Practices towards Vitamin D Sources and Insufficiency Among Healthcare Workers in Erbil, Iraq, 2025”. Zanco Journal of Medical Sciences (ZJMS) 30, no. 2 (August 12, 2026): 333–344. Accessed August 20, 2026. https://zjms.hmu.edu.krd/index.php/zjms/article/view/1224.