Funding for this research was provided by:
The Regional Research Fund in Norway (229883, 234978)
The University of South-Eastern Norway (-)
Received: 12 November 2018
Accepted: 28 May 2019
First Online: 10 June 2019
Ethics approval and consent to participate
: The Norwegian Data Service for Social Sciences approved the project according to the Personal Data Act (approval no. 34831 and 36230). Ethical approval in line with the Health Research Act was not applicable. The participants signed informed consent. The data are anonymised in the presentations.
: Not applicable.
: The authors declare that they have no competing interests.