Grøntvedt, Trond Viggo http://orcid.org/0000-0002-6601-5200
Bendixen, Mons
Botnen, Ernst O.
Kennair, Leif Edward Ottesen
Article History
Received: 6 September 2019
Revised: 25 October 2019
Accepted: 29 October 2019
First Online: 18 November 2019
Compliance with Ethical Standards
:
: The authors declare they have no conflict of interest.