Ishaq, B. H. ., Khan, Z. ., Ahmad, S. ., Muhammad, P. ., Mustafa, A. . and Khan, S. . (2022) “Selected Vitamins and Trace Elements Support Immune Function by Strengthening Epithelial Barriers and Cellular and Humoral Immune Responses: Implications for Pulmonary Health and Disease Management - A Systematic Review”, Pakistan Journal of Chest Medicine, 28(3), pp. 395–401. Available at: https://pjcm.net/index.php/pjcm/article/view/874 (Accessed: 17April2026).