Maula, F., khan, M. N., Adil, M., Ullah, J., Rauf, A. and ullah, S. (2015) “ECHOCARDIOGRAPHIC FINDINGS IN CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) PATIENTS”, Pakistan Journal of Chest Medicine, 19(1). Available at: https://www.pjcm.net/index.php/pjcm/article/view/48 (Accessed: 31May2026).