Risk factors of asthma exacerbation based on asthma severity: a nationwide population-based observational study in South Korea

Kang, H.-R., Song, H. J., Nam, J. H., Hong, S.-H., Yang, S.-Y., Ju, S., Lee, S. W., Kim, T.-B., Kim, H.-L., Lee, E.-K.
BMJ Publishing
Published 2018