Erratum to: npj Primary Care Respiratory Medicine (2017); doi:10.1038/s41533-017-0039-5; Published 09 June 2017

The original version of this article contained an error in the spelling of the author I. G. Tsiligianni, which was incorrectly given as K. W. I. G. Tsiligianni. This has now been corrected in both the PDF and HTML versions of the article.