Funding for this research was provided by:
National Institute of Health Research (PB-PG-0711-25040)
Text and Data Mining valid from 2018-03-27
Received: 18 January 2017
Accepted: 19 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: Written informed consent was obtained from all participants included in the study. The study received favourable ethical approval from the North East-York Research Ethics Committee (Reference [CitationRef removed]/NE/0365) and the Durham University School of Medicine, Pharmacy and Health Ethics Sub-Committee (Application ESC2/2013/19).
: not applicable.
: The authors declare that they have no competing interests.
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