Nilssen, Yngvar
Eriksen, Morten Tandberg
Guren, Marianne G.
Møller, Bjørn
Article History
Received: 7 December 2020
Accepted: 25 May 2021
First Online: 30 June 2021
Declarations
:
: The Norwegian Regional Ethics Committee concluded that no approval was needed for this study (reference number: 2017/428REK sør-øst A). Thus, they gave the authors exemption from the statutory duty of confidentiality. The approval of handling indirect identifiable data was obtained from the Data Protection Officer (PVO) (reference number: 2017/6597).
: Not applicable.
: The authors declare that they have no competing interests.