Klæstad, Elise http://orcid.org/0000-0002-6635-8086
Opdahl, Signe
Engstrøm, Monica Jernberg
Ytterhus, Borgny
Wik, Elisabeth
Bofin, Anna Mary
Valla, Marit
Article History
Received: 27 July 2019
Accepted: 9 January 2020
First Online: 16 January 2020
Compliance with ethical standards
:
: All authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved, including dispensation from the requirement of patient consent, by the Regional committee for medical research ethics (REK 836-09).