Funding for this research was provided by:
Health Education England (NURA54)
Received: 26 September 2016
Accepted: 17 January 2018
First Online: 31 January 2018
Ethics approval and consent to participate
: Approval for the study was obtained from the Ethical Research Committee, University of Salford, and the University of Manchester Research Ethics Committee.
: The authors declare that they have no competing interests.
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