Sundh, Josefin
Montgomery, Scott
Hasselgren, Mikael
Kämpe, Mary
Janson, Christer
Ställberg, Björn
Lisspers, Karin
Article History
Received: 9 February 2016
Revised: 10 July 2016
Accepted: 9 August 2016
First Online: 20 October 2016
Competing interests
: BS is an Associate Editor of npj Primary Care Respiratory Medicine, but was not involved in the editorial review of, nor the decision to publish, this article. The other authors declare no conflict of interest.