van de Hei, S. J. http://orcid.org/0000-0003-2844-6904
Flokstra-de Blok, B. M. J.
Baretta, H. J.
Doornewaard, N. E.
van der Molen, T.
Patberg, K. W.
Ruberg, E. C. M.
Schermer, T. R. J.
Steenbruggen, I.
van den Berg, J. W. K.
Kocks, J. W. H. http://orcid.org/0000-0002-2760-0693
Article History
Received: 29 August 2019
Accepted: 7 April 2020
First Online: 15 May 2020
Competing interests
: J.W.H.K., T.R.J.S. and T.v.d.M. are editorial board members of npj Primary Care Respiratory Medicine, but were not involved in the editorial review of, nor the decision to publish, this article. J.W.H.K. is medical advisor for the CERTE asthma/COPD service, a service from the not-for-profit primary care laboratory. T.v.d.M. is member of the board of trustees of CERTE laboratories. The other authors declare no competing interests.