Received: 19 April 2020
Accepted: 7 September 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: In compliance with Norwegian legislation on ethics in research, the study was regarded as health service research and was approved by the Norwegian Data Ethical Approval: Data Protection Official for Research, Norwegian Social Science Data Service (Project no 559216). Each participant provided written consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.