Otterstad, Jan Erik
Norum, Ingvild Billehaug http://orcid.org/0000-0001-8928-1176
Ruddox, Vidar
Le, An Chau Maria
Bendz, Bjørn
Munkhaugen, John
Klungsøyr, Ole
Edvardsen, Thor
Article History
Received: 23 April 2021
Accepted: 12 July 2021
First Online: 29 July 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Regional Ethics Committee of Health Region South-East, Norway (2015/2359).
: Informed consent was obtained from all individual participants included in the study.