Devine, Rebecca E
Sheikh, Aziz
Nwaru, Bright I
Article History
Received: 6 August 2015
Revised: 23 November 2015
Accepted: 22 December 2015
First Online: 3 March 2016
Competing interests
: AS is Joint Editor-in-Chief 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.