Limsuwat, Chok, Nopakoon Nantsupawat, Elvira Umyarova, Kamonpun Ussavarungsi, and Kenneth Nugent. “Factors Affecting Mortality in Patients With COPD Exacerbations Requiring ICU Admission”. The Southwest Respiratory and Critical Care Chronicles 1, no. 2 (March 30, 2013): 3-10. Accessed April 25, 2024. https://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/61.