Funding for this research was provided by:
Wellcome Trust ([106679/Z/14/Z])
Department of Health (England) ([PR-UN-0409-10109])
Insititute of Grocery Distribution ([RG83425])
Text and Data Mining valid from 2018-08-16
Received: 28 March 2018
Accepted: 23 July 2018
First Online: 16 August 2018
: 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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