Text and Data Mining valid from 2020-04-21
Received: 16 August 2019
Accepted: 29 March 2020
First Online: 21 April 2020
Ethics approval and consent to participate
: The Medical Ethics Committee of the Vrije Universiteit Amsterdam confirmed that this study did not apply to the Medical Research Involving Human Subjects Act (WMO), due to the nature of the measurements (anonymous sales data and anonymous questionnaires) and therefore no approval was necessary. Verbal informed consent was obtained from all participants.
: Not applicable.
: TH is currently a paid employee of the supermarket chain (Albert Heijn / Ahold Delhaize). The other authors declare that they have no financial relationships relevant to this article. The supermarket chain participated in the organization of the study but did not fund the research that is reported. The supermarket chain has signed a contract and agreed that the results of this research will be published regardless of its outcome.