This article from the March 2017 issue of theEuropean Respiratory Journalwas published with an error in figure 4. The item “heterogeneous emphysema” appeared twice on the third line of the flowchart in the figure, when the chart should have distinguished between “heterogeneous emphysema” and “homogeneous emphysema” categories. The corrected figure is shown below, and the article has been corrected and republished online.
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