Funding for this research was provided by:
Economic and Social Research Council (Res 590-25-0004)
Text and Data Mining valid from 2017-09-02
Received: 21 April 2017
Accepted: 22 August 2017
First Online: 2 September 2017
: SS, FHB, LE, EG, EK, and AA are members of Fuse—the Centre for Translational Research in Public Health, a UK Clinical Research Collaboration (UKCRC) Public Health Research Centre of Excellence. SS, EK and AA are also supported by the National Institute for Health Research (NIHR)’s School for Public Health Research (SPHR). EK is also a member of the NIHR School of Primary Care Research.
: Ethical approval and consent to participate was not required for this review.
: Not applicable.
: The authors declare that they have no competing interests.
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