A Meta-Analysis of Correlations between Chronic Obstructive Pulmonary Disease, Smoking, and Severity of COVID-19. J Epidemiol Public Healt [Internet]. 2021 Dec. 16 [cited 2026 Feb. 11];6(4):415-2. Available from: https://www.jepublichealth.com/index.php/jepublichealth/article/view/437