APA (7th ed.) Citation

FR, G. (2020). Smoking links to the severity of COVID-19: An update of a meta-analysis. Journal of medical virology, 92(11), 2304. https://doi.org/10.1002/jmv.25967

Chicago Style (17th ed.) Citation

FR, Guo. "Smoking Links to the Severity of COVID-19: An Update of a Meta-analysis." Journal of Medical Virology 92, no. 11 (2020): 2304. https://doi.org/10.1002/jmv.25967.

MLA (9th ed.) Citation

FR, Guo. "Smoking Links to the Severity of COVID-19: An Update of a Meta-analysis." Journal of Medical Virology, vol. 92, no. 11, 2020, p. 2304, https://doi.org/10.1002/jmv.25967.