Iftikhar Ali Kakar, Abdul Baqi, Nasir Azim, Hafsa Rafiq, Iqra Lodhi, Khalid Shahab. Pulmonary Arterial Hypertension in COPD and its Correlation with Disease Severity. Pakistan Journal of Medical & Health Sciences [Internet]. 2023 Feb. 3 [cited 2025 Jun. 5];16(12):391. Available from: https://www.pjmhsonline.com/index.php/pjmhs/article/view/3705