Funding for this research was provided by:
Norges Forskningsråd (Project 254694)
Received: 30 October 2019
Accepted: 1 June 2020
First Online: 30 June 2020
Ethics approval and consent to participate
: The survey was approved by the Norwegian Centre for Research Data (NSD). Participants were informed in written about the survey aim and that their responses would be treated confidentially. Consent were in accordance with the NSD guidelines given by returning a completed questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.