Funding for this research was provided by:
National Institute for Health Research (NIHR) Collaboration for Leadership in Applied Health Research and Care of the South West Peninsula
Received: 13 July 2017
Accepted: 8 February 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: Ethical approval was granted by the University of Exeter Medical School ethics committee (REC 15/11/084). All participants in the study gave informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.
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