Hull, Sally A
McKibben, Shauna
Homer, Kate
Taylor, Stephanie JC
Pike, Katy http://orcid.org/0000-0003-4911-6082
Griffiths, Chris
Article History
Received: 16 March 2016
Revised: 8 June 2016
Accepted: 17 June 2016
First Online: 18 August 2016
Competing interests
: CG is an Assistant 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. The other authors declare no conflict of interest.