Gul, Pari, Palwasha Gul, Shereen khan, Seema Nayab, Talha Yaseen, and Gulghuty Jogezai. “ Causes of Pulmonary Hypertension and Its Correlation With 2D Echocardiography: A CT Pulmonary Angiogram Based Study”. Pakistan Journal of Chest Medicine 26, no. 1 (September 9, 2020): 08–14. Accessed June 13, 2026. https://www.pjcm.net/index.php/pjcm/article/view/609.