Hofmann, Bjørn http://orcid.org/0000-0001-6709-4265
Article History
Received: 7 April 2017
Accepted: 3 December 2018
First Online: 17 December 2018
Compliance with ethical standards
:
: The author has no conflicts of interest to declare. This research does not involve human participants and/or animals, does not require informed consent, and does not require ethical approval.Part of this research has been funded by the Norwegian Financial Mechanism 2009-2014 and the Ministry of Education, Youth and Sports under Project Contract no. MSMT-28477/2014, Project no. 7F14236.