Jentoft, Svein
Finstad, Bjørn-Petter
Article History
Received: 31 May 2017
Accepted: 12 December 2017
First Online: 16 May 2018
Change Date: 17 September 2018
Change Type: Correction
Change Date: 17 September 2018
Change Type: Correction
Change Details: Due to a technical problem the copyright line in the HTML version of this article was wrong. Correct is © The Author (s) 2018. This error is happens only in the HTML data of this article, the PDF file is correct. The error has been corrected.
Change Details: Due to a technical problem the copyright line in the HTML version of this article was wrong. Correct is �� The Author (s) 2018. This error is happens only in the HTML data of this article, the PDF file is correct. The error has been corrected.
Competing interests
: The authors declare they have no competing interests.
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