Solbakken, Gro http://orcid.org/0000-0002-6534-7588
Bjørnarå, Bård
Kirkhus, Eva
Nguyen, Bac
Hansen, Gunnar
Frich, Jan C.
Ørstavik, Kristin
Funding for this research was provided by:
The Sophies Minde Foundation (1210)
Vestre Viken health Trust (1903008)
Article History
Received: 11 February 2019
Accepted: 6 June 2019
First Online: 19 June 2019
Ethics approval and consent to participate
: This study was approved by the Regional Committees for Medical and Health Research Ethics, South East (reference number 2015/2354). All participants gave their written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.