Funding for this research was provided by:
European Research Council (Grant reference: PIDS, 803194)
Received: 24 October 2019
Accepted: 27 January 2020
First Online: 31 January 2020
Ethics approval and consent to participate
: Approved by the Health and Life Sciences Research Ethics Committee at the University of Liverpool (reference number: 4612). Informed consent was obtained from all the participants before they started the study.
: Not applicable.
: ER has previously been the recipient of research funding from Unilever and the American Beverage Association. However, he does not consider this to be a conflict of interest for the present research. The other authors declare that they have no competing interests.