Prof. Dr. Yahya Altufaily, Lubna Mohammad Hussein, and Dr. Fadhil Sahib Hassnawi. “Possible Association Between Serum Vitamin D Level and Community-Acquired Pneumonia in Children”. International Journal of Pharma and Bio Sciences 12, no. 4 (December 31, 2021): 47–52. Accessed September 3, 2026. https://ijpbs.net/index.php/journal/article/view/6950.