Funding for this research was provided by:
Research for Patient Benefit Programme (PB-PG -0214-33092)
Received: 1 October 2018
Accepted: 31 January 2019
First Online: 12 February 2019
Ethics approval and consent to participate
: This study was approved by the East Midlands - Nottingham 2 Research Ethics Committee (REC reference: 15/EM/0534). Written consent to participate was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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