Sundal, Hildegunn http://orcid.org/0000-0003-3309-7155
Vatne, Solfrid
Article History
Received: 6 November 2019
Accepted: 4 June 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: Regional Committees for Medical and Health Research Ethics of Norway (4.2006.3865/4.2007.1097) and the Ministry of Health and Care Services of Norway (07/3088–14.06.2007) have approved this study. This study has been reported to the Norwegian Centre for Research Data (04.06.2007–16697/JE). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that there is no conflict of interest.