Kjelle, Elin
Myklebust, Aud Mette
Article History
Received: 1 February 2021
Accepted: 28 May 2021
First Online: 5 June 2021
Declarations
:
: Ethics approval was deemed unnecessary according to national regulations in Norway “Lov om medisinsk og helsefaglig forskning (helseforskningsloven)” ExternalRef removed. The Norwegian Centre for Research Data approved the treatment of personal information – project reference 358427. All methods were carried out in accordance with relevant guidelines and regulations. <b>Informed consent</b> was obtained from all subjects.
: All participants have given consent for publication.
: The authors declare that they have no competing interests.