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Article History

Received: 21 December 2022

Accepted: 20 April 2023

First Online: 11 May 2023

Declarations

:

: The authors declare that they have no competing interests.

: All methods were carried out in accordance with relevant guidelines and regulations. No experiments were performed. Informed consent was obtained from all subjects and/or their legal guardian(s) by Kantar for both studies. Participants were informed about the studies in writing, and participation was voluntary.According to Norwegian regulations, specifically the Health Research Act (ACT 2008-06-20 no. 44: Act on medical and health research), no approval from an institutional review board/research ethics committee is necessary when no patient data are collected. Thus, there was no requirement for an institutional review board to evaluate the 2019 study. Instead, the 2019 study was evaluated and recommended by the Data Protection Official at the Norwegian Centre for Research Data (ref. 589400). NSD is a national centre and archive for research data for a number of research institutions, among them the University of Oslo. (NSD is, however, not a research ethics committee.)Patient data were collected in the 2020 study, but the results from those items are not published in this article. The Regional Committee for Medical and Health Research Ethics (REK) gave approval to the 2020 study (reg. 133226/2020).

: Not applicable.