Article Text
Correction
Correction
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SE Marsh, J Travers, M Weatherall, et al. Proportional classifications of COPD phenotypes. Thorax 2008;63:761–7. doi:10.1136/thoraxjnl-2007-089193
Figure 3 of this article was published omitting the clear circle in the middle of the emphysema circle as shown in the corrected figure below:
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