The impact of COPD and smoking history on the severity of COVID-19: A systemic review and meta-analysis.
J Med Virol. 2020 Oct;92(10):1915-1921. doi: 10.1002/jmv.25889. Epub 2020 May 17.
J Med Virol. 2020.
PMID: 32293753
Free PMC article.