APA (7th ed.) Citation

Choi, J. Y., Kim, K. J., & Rhee, C. K. Change in exacerbation rate of COPD patients before and after COVID-19 infection. Nature Portfolio.

Chicago Style (17th ed.) Citation

Choi, Joon Young, Kyung Joo Kim, and Chin Kook Rhee. Change in Exacerbation Rate of COPD Patients Before and After COVID-19 Infection. Nature Portfolio.

MLA (9th ed.) Citation

Choi, Joon Young, et al. Change in Exacerbation Rate of COPD Patients Before and After COVID-19 Infection. Nature Portfolio.

Warning: These citations may not always be 100% accurate.