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Authors
Knizek, Birthe Loa http://orcid.org/0000-0002-5952-9895
Hjelmeland, Heidi
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Article History
Received: 6 February 2018
Accepted: 10 August 2018
First Online: 22 August 2018
Ethics approval and consent to participate
: The project was approved by the Regional Committee for Medical and Health Research Ethics Central (REC), Norway. Signed consent was obtained from all participants of the study.
: Not applicable.
: The authors declare that they have no competing interests.
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