Anjum, Amin, Muhammad Khaqan Khalid, Smavia Shafiq, Tanzeel ur Rehman Mustafa, and Asvad Munir. “Association of ECG Lead I Sign in Patients of Chronic Obstructive Pulmonary Disease”. Indus Journal of Bioscience Research 3, no. 4 (April 26, 2025): 618–622. Accessed April 9, 2026. https://induspublishers.com/index.php/IJBR/article/view/973.