Schermer, Tjard R
Robberts, Bas
Crockett, Alan J
Thoonen, Bart P
Lucas, Annelies
Grootens, Joke
Smeele, Ivo J
Thamrin, Cindy
Reddel, Helen K
Article History
Received: 30 December 2015
Revised: 10 June 2016
Accepted: 5 July 2016
First Online: 29 September 2016
Competing interests
: TRS 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. The other authors declare no conflict of interest.