“( Withdrawn )                                                                                  Prevalence of Vitamin D Deficiency Among School Children in Tobruk City, Libya”. Derna Academy Journal for Applied Sciences 4, no. 1 (July 3, 2025): 26–33. Accessed March 12, 2026. https://dp.lad.edu.ly/journals/index.php/dajas/article/view/135.