Received: 20 January 2021
Accepted: 22 April 2021
First Online: 3 May 2021
: Being a health service research project, the current study falls outside the Norwegian Health Research Act and did not require approval of a regional ethics committee [CitationRef removed, CitationRef removed]. This was clarified with the Regional Committee for Medical and Health Research Ethics. Approval of the study and for processing personal data was obtained from the Norwegian Centre for Research Data (NSD), that stated the collected personal data not to be sensitive (ref.no. 907304) and that the processing of personal data was in accordance with data protection legislation [CitationRef removed]. The project was also approved by the manager group at the Oral Health Centre of Expertise in Eastern Norway. Participation was voluntary and no compensation was given to the respondents. Signed, informed consent was obtained from all subjects. Anonymity of the respondents was ensured by QuestBack. The protocol was performed in accordance with the relevant guidelines and regulations/Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests. The authors alone are responsible for the content and writing of the paper.