karim, mustafa ahmed. “The Correlation Between HRCT Phenotypes and Spirometric Indices in Patients With COPD”. Karbala Journal of Medicine 14, no. 1 (June 29, 2021): 2447–2455. Accessed April 28, 2024. https://journals.uokerbala.edu.iq/index.php/kj/article/view/839.