Punekar YS, Shukla A, Müllerova H. International Journal of COPD. 2014;9:65–73.
On page 69, note that there was an error in the bar graph shown in Figure 1. The group
with no exacerbations during the 12 months of follow-up should have a zero value for
the cost of exacerbations. The corrected figure is provided below.