Iversen, Kristin
Drivdal, Lill Monica
Billaud Feragen, Kristin J.
Geirdal, Amy Ă˜stertun
Funding for this research was provided by:
Oslo University Hospital
Article History
Received: 14 July 2016
Accepted: 9 July 2018
First Online: 25 July 2018
Ethics approval and consent to participate
: The study was approved by the Regional ethics committee of Southern Norway and conducted in accordance with the Declaration of Helsinki. All the participants gave written, informed consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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