Funding for this research was provided by:
Asthma UK (08/041)
Text and Data Mining valid from 2018-05-09
Received: 12 February 2018
Accepted: 23 April 2018
First Online: 9 May 2018
Ethics approval and consent to participate
: This study was approved by the Royal Brompton & Harefield NHS Trust Ethics committee and all subjects gave written informed consent.
: The authors declare that they have no competing interests.
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