Dr. Ashish Chatterjee, Dr. Dadan Prasad, and Dr. Rajeev Kumar. 2026. “Electrocardiographic and Echocardiographic Changes in Patients With Chronic Obstructive Pulmonary Disease and Their Correlation With Disease Severity: A Cross-Sectional Study”. International Journal of Pharmacy Research & Technology (IJPRT) 16 (1):3418-24. https://ijprt.org/index.php/pub/article/view/2045.