COPD and the risk of poor outcomes in COVID-19 :   A systematic review and meta-analysis / 
Firoozeh V Gerayeli  [and eight others] 
<br/><br/>EClinicalMedicine. 2021 Mar 33:100789<br/> DOI: 10.1016/j.eclinm.2021.100789 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pulmonary Disease, Chronic Obstructive<br/>COVID-19<br/>Meta-Analysis<br/>Mortality