Funding for this research was provided by:
Asthma UK and Queen Mary University London
Article History
Received: 16 February 2018
Revised: 11 June 2018
Accepted: 12 June 2018
First Online: 18 July 2018
Change Date: 14 January 2019
Change Type: Correction
Change Details: In the PDF and HTML versions of this Brief Communication a couple of words are not shown in a sentence in the penultimate sentence of the first paragraph of the Results, changing the meaning. This sentence should have been “The setting of a SABA use threshold was likened to “tossing a coin” (Expert 3, primary care).”
Competing interests
: C.G. is an assistant editor of npj Primary Care Respiratory Medicine and M.T. is an associate editor of <i>npj Primary Care Respiratory Medicine</i> but were involved in neither the editorial review of, nor any decision to publish or not publish this article. The remaining authors declare no competing interests.