Hwang, Y. I., Kim, C. H., Kang, H., Shin, T., Park, S. M., Jang, S. H., . . . Jung, K. (2009). Comparison of the Prevalence of Chronic Obstructive Pulmonary Disease Diagnosed by Lower Limit of Normal and Fixed Ratio Criteria. The Korean Academy of Medical Sciences.

Hwang, Yong Il, et al. Comparison of the Prevalence of Chronic Obstructive Pulmonary Disease Diagnosed By Lower Limit of Normal and Fixed Ratio Criteria. The Korean Academy of Medical Sciences, 2009.

Hwang, Yong Il, et al. Comparison of the Prevalence of Chronic Obstructive Pulmonary Disease Diagnosed By Lower Limit of Normal and Fixed Ratio Criteria. The Korean Academy of Medical Sciences, 2009.