Thomassen, Gunn-Kristin Knudsen
Jørgensen, Vivien
Normann, Britt
Article History
Received: 12 April 2019
Revised: 2 November 2019
Accepted: 3 November 2019
First Online: 13 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The Norwegian Centre for Research Data approved the study (34619), which was performed according to the Declaration of Helsinki.