Naeem, Zahid. “Vitamin D Deficiency: It’s Contributing Factors and Prevention”. Journal of Shifa Tameer-e-Millat University 2, no. 2 (December 19, 2019): 77-79. Accessed December 4, 2024. https://j.stmu.edu.pk/ojs/index.php/jstmu/article/view/77.