B. Ali, I. . Shah, A. . Ali, E. . Rehman, M. K. . Khan, and H. . Hakim, “Undiagnosed Chronic Obstructive Pulmonary Disease amongst Coronary Artery Disease Patients: A single centre study”, Pak J Chest Med, vol. 28, no. 4, pp. 414–419, Dec. 2022.