Funding for this research was provided by:
Wellcome Trust (106679/Z/14/Z)
Department of Health (PR-UN-0409-10109)
Insititute of Grocery Distribution (RG83425)
Text and Data Mining valid from 2018-05-14
Received: 20 October 2017
Accepted: 28 March 2018
First Online: 14 May 2018
Ethics approval and consent to participate
: Approved by the Psychology Research Ethics Committee of the University of Cambridge (Reference Number: PRE.2016.035).
: Not applicable.
: The authors declare that they have no competing interests.
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