Received: 14 April 2020
Accepted: 28 June 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: The study protocol was approved by the Norwegian Centre for Research Data, which reviewed ethical aspects of the study related to collecting and handling the data (voluntary participation based on informed consent, the anonymity of informants and the presence of appropriate data storage protocols). All interviewees participated voluntarily and provided informed written consent.
: Not applicable.
: The authors declare that they have no competing interests.