Alma, Harma
de Jong, Corina
Jelusic, Danijel
Wittmann, Michael
Schuler, Michael
Blok, Bertine Flokstra-de
Kocks, Janwillem
Schultz, Konrad
Molen, Thys van der
Article History
Received: 8 February 2016
Revised: 3 May 2016
Accepted: 24 May 2016
First Online: 1 September 2016
Competing interests
: J.W.H.K. reports receiving personal fees from Novartis; personal fees from Boehringer Ingelheim; grants and personal fees from GSK; grants from Stichting Zorgdraad; personal fees from IPCRG; personal fees from Springer Media; and travel arrangements from Chiesi BV, GlaxoSmithKline BV and IPCRG, all outside the submitted work. K.S. received lecture fees from Boehringer, AstraZeneca, Berlin Chemie, Novartis, Chiesi, Mundipharma, Takeda, GSK and MSD, all outside the submitted work. T.v.d.M. developed the CCQ and holds the copyright. J.W.H.K. 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 remaining authors declare no conflict of interest.