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Authors
Lerdal, Anners https://orcid.org/0000-0002-7144-5096
Hofoss, Dag https://orcid.org/0000-0002-6888-6333
Gay, Caryl L. https://orcid.org/0000-0002-6865-6335
Fagermoen, May Solveig
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Article History
Received: 9 March 2019
Accepted: 25 July 2019
First Online: 16 August 2019
Ethics approval and consent to participate
: The research was performed in accordance with the Declaration of Helsinki and approved by the Regional Committee on Medical Ethics in Norway (REC S-08288a-2008/8618). The participants signed an informed consent form prior to participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.
