Børve, Jorunn
Dalen, Martin
Stensvand, Arne
Article History
Accepted: 13 September 2019
First Online: 28 October 2019
Compliance with ethical standards
: The study was funded by the Research Council of Norway and Skattefunn.
: This article does not contain any studies with human participation or animals performed by any of the authors.
: The authors declare that no known conflicts of interest exist.