Skaalvik, Cecilie http://orcid.org/0000-0002-3009-4365
Article History
Received: 9 October 2018
Accepted: 31 January 2020
First Online: 19 February 2020
Compliance with ethical standards
:
: The author declares that she have no conflict of interest.
: The study was conducted in line with the ethical research guidelines and approved by the Norwegian Centre for Research Data (NSD) which serves as a national ethical research committee.