Bertsias, Antonios
Tsiligianni, Ioanna G
Duijker, George
Siafakas, Nikolaos
Lionis, Christos
,
Article History
Received: 4 December 2013
Revised: 14 March 2014
Accepted: 29 April 2014
First Online: 26 June 2014
Competing interests
: IT 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. All other authors declare no conflict of interest.