Fakılı, Füsun, and Osman Elbek. “Exacerbations Of Chronic Obstructive Pulmonary Disease And It’s Results”. European Journal of Therapeutics 15, no. 1 (January 1, 2009): 88–91. Accessed December 22, 2024. https://eurjther.com/index.php/home/article/view/1294.