Received: 30 October 2019
Accepted: 17 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: The study was conducted in accordance with ethical guidelines and approved by the Regional Committee for Medical Research Ethics (REK). The Norwegian Data Inspectorate approved the collection of data. The study participants received the research-related information in a letter by postal mail and consented by filling out and returning the questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.