Funding for this research was provided by:
Received: 10 June 2016
Accepted: 12 January 2018
First Online: 30 January 2018
Ethics approval and consent to participate
: The research was approved by the University of Exeter Medical School Research Ethics Committee (Reference number PF/CB/14/09/056). Prior to completing the interview, all participants signed a consent form stating that they were willing to take part.
: Not Applicable
: The authors declare that they have no competing interests
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