Funding for this research was provided by:
Norges Forskningsråd (149564,168373, 195403)
Article History
Received: 19 February 2019
Accepted: 20 February 2020
First Online: 28 February 2020
Ethics approval and consent to participate
: All information about the participants in this study was obtained by Norwegian Social Science Data Services, in accordance with constitutional rules. Informed consent had been given by each respondent. All information was pseudonymised and later anonymized by Norwegian Social Science Data Services. The anonymized data material is available to researchers who provide a methodologically sound proposal in accordance with the informed consent of the respondents.
: Not applicable.
: The authors declare that they have no competing interests.