Spaans, Karsten
Hreinsdóttir, Sigrún
Hooper, Andrew
Ófeigsson, Benedikt Gunnar
Article History
Received: 10 December 2014
Accepted: 8 April 2015
First Online: 20 May 2015
Change Date: 14 September 2016
Change Type: Update
Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has not been fixed in the paper.
Competing interests
: The authors declare no competing financial interests.