Funding for this research was provided by:
Health Services and Delivery Research Programme (HS&DR 13/10/75)
Text and Data Mining valid from 2019-04-16
Received: 12 June 2018
Accepted: 27 March 2019
First Online: 16 April 2019
Ethics approval and consent to participate
: The study received NHS Research Ethics approval from the NRES Committee NRES Committee London – Fulham (Ref: 13/LO/2062) on 29th December 2014. All participants provided written informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.
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