Mahmud Abushhewa, Abdulati Salem, Abdusalam Mahmoud, Ramzi Mohsen, and Embarka Aqila. 2024. “Preliminary Study of Vitamin D Deficiency and Its Associated Risk Factors in Libya”. AlQalam Journal of Medical and Applied Sciences, January, 7-10. https://journal.utripoli.edu.ly/index.php/Alqalam/article/view/443.