Norum, Ingvild Billehaug http://orcid.org/0000-0001-8928-1176
Otterstad, Jan Erik
Ruddox, Vidar
Bendz, Bjørn
Edvardsen, Thor
Article History
Received: 21 October 2021
Revised: 28 December 2021
Accepted: 10 February 2022
First Online: 15 March 2022
Declarations
:
: The authors declare that they have no conflict of interest.
: All the procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation and with the Helsinki Declaration of 1964 and later versions. Approval was granted by the Regional Ethics Committee of Health Region South-East, Norway (2012/1592). Informed consent was obtained from all individual participants included in the study.