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Article History
Received: 15 June 2019
Accepted: 13 November 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: The source interview study received ethical approval under the University of Birmingham’s ethics procedures (reference ENR_15–1473). Both verbal and written consent for the interview were taken, in the case of video interviews verbal consent was obtained prior to the interview and confirmed in writing by post.
: All participants gave informed consent, both verbal and written, for the use of their material in academic research and in publication of findings.
: The authors declare that they have no competing interests.
