Shehzad, M. I., Mannan, M. A. U., Naveed, A., Tariq, M. W. and Afzal, M. W. (2020) “ Pakistan”., Pakistan Journal of Chest Medicine, 26(1), pp. 33–36. Available at: https://pjcm.net/index.php/pjcm/article/view/639 (Accessed: 6November2025).