Nwaru, Bright I
Nurmatov, Ulugbek
Sheikh, Aziz
Article History
Received: 27 July 2015
Revised: 11 November 2015
Accepted: 24 November 2015
First Online: 28 January 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 remaining authors declare no conflict of interest.