Funding for this research was provided by:
Research Trainees Coordinating Centre (DRF-2013-06-038)
Text and Data Mining valid from 2018-06-18
Received: 6 November 2017
Accepted: 23 May 2018
First Online: 18 June 2018
Ethics approval and consent to participate
: The research was approved by an NRES (National Research Ethics Service) ethics committee (Ref: 14/NW/0303) and completed in February 2015. Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflicts of interest.
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