©2018 Løset et al. This is an open
access article distributed under the terms of the
Creative
Commons
Attribution
License,
which
permits
unrestricted use, distribution, and
reproduction
in any medium,
provided
the original
author
and source
are credited.
Except where otherwise noted, this item's license is described as ©2018 Løset et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.