Funding for this research was provided by:
Economic and Social Research Council (ES/J500057/1)
Text and Data Mining valid from 2018-08-22
Received: 29 March 2018
Accepted: 26 July 2018
First Online: 22 August 2018
Ethics approval and consent to participate
: Ethics approval for the wider study has been obtained from King’s College London under KCL Ethics Ref: LRS-15/16–2618. No consent to participate was required for this review.
: Not applicable.
: The authors declare that they have no competing interests.
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