Funding for this research was provided by:
Text and Data Mining valid from 2020-04-15
Received: 10 February 2020
Accepted: 31 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The study was approved by the Norwegian Centre for Research Data, reference 34930. Written and oral information about the study was provided, and all subjects participated with written informed consent. The study was conducted in line with the Declaration of Helsinki . During transcription of the interviews, all names, places, and institutions that could identify persons were removed.
: Not applicable.
: The authors declare that they have no competing interests.