- Correspondence to Dr Sylvia Verbanck, Respiratory Division, University Hospital UZBrussel, Vrije Universiteit Brussel, Laarbeeklaan 101, Brussels 1090, Belgium;
- Received 8 May 2017
- Revised 14 July 2017
- Accepted 14 August 2017
- Published online 2 September 2017.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.