Article History
Received: 19 July 2019
Accepted: 14 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: The project has been approved by the University of South-Eastern Norway’s institutional review board, the Norwegian Data Service for Social Sciences, according to the Personal Data Act (approval no. 918960). Ethical approval in line with the Norwegian Health Research Act was not applicable. The participants signed informed consent.
: Not applicable.
: The authors declare that they have no competing interests.