Updates are available Erratum dated 2017-06-22
Click to view Erratum: https://doi.org/10.1038/npjpcrm.2017.6
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Authors
Cragg, Liza
Williams, Siân
Chavannes, Niels H
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Article History
Received: 2 March 2016
Revised: 20 April 2016
Accepted: 11 May 2016
First Online: 30 June 2016
Competing interests
: NHC is an Associate Editor of <i>npj Primary Care Respiratory Medicine</i>, but was not involved in the editorial review of, nor the decision to publish this article.
