Klausen, Anja Estensen
Kanstad, Terje
Bjøntegaard, Øyvind
Sellevold, Erik J.
Article History
Received: 13 July 2018
Accepted: 2 December 2018
First Online: 5 December 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals.