Piira, Anu
Lannem, Anne M.
Gjesdal, Knut
Knutsen, Raymond
Jørgensen, Lone
Glott, Thomas
Hjeltnes, Nils
Knutsen, Synnøve F.
Sørensen, Marit
Article History
Received: 8 October 2019
Revised: 26 November 2019
Accepted: 27 November 2019
First Online: 17 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: We ensured that this research was conducted with high ethical standards.