Erratum

The original version of this article [1] unfortunately contained errors that have since been corrected.

The word “pharmo” has been fully capitalised to “PHARMO” throughout the article.

The reference to Table 2 in the first and second sentence under the Outcomes heading has been replaced with Fig. 3.

Under the Abbreviations heading ‘extrafine-particle’ was repeated, this has been corrected to ‘EF-HFA-BDP [Qvar®]: extrafine-particle hydrofluoroalkane beclomethasone dipropionate’.

The competing interests of Nicolas Roche and Theresa Guibert have been amended.

Academic affiliations for Dirkje S. Postma (2), Richard J. Martin (3), Ron M.C. Herrings (4), Jetty Overbeek (4), and Nicolas Roche (7) have been corrected.

Figure 3 in the online and pdf version did not match, this been amended.