Lien, Tonje G. http://orcid.org/0000-0003-3331-4201
Borgan, Ørnulf
Reppe, Sjur
Gautvik, Kaare
Glad, Ingrid Kristine
Funding for this research was provided by:
Universitetet i Oslo
Article History
Received: 7 May 2017
Accepted: 21 February 2018
First Online: 7 March 2018
Ethics approval and consent to participate
: Prior to the study, validation and recommendation were obtained by the Norwegian Local Research Ethics Committee (REK 2010/2539). All sampling and procedures followed the law and all subjects gave their informed written consent for participation.
: All subjects gave their informed written consent for publication of results.
: The authors declare that they have no competing interests.
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