“Echocardiographic Findings in Patients with Chronic Obstructive Pulmonary Disease and Their Correlation with Disease Severity”, JUBPAS, vol. 27, no. 3, pp. 392–399, Jul. 2019, Accessed: May 03, 2025. [Online]. Available: https://www.journalofbabylon.com/index.php/JUBPAS/article/view/2545