<p>Copyright © 2015, The Authors.  This is an open-access article distributed under the terms of the <a href="http://creativecommons.org/licenses/by-nc/4.0/">Creative Commons Attribution-NonCommercial license</a>, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.</p>
Except where otherwise noted, this item's license is described as <p>Copyright © 2015, The Authors. This is an open-access article distributed under the terms of the <a href="http://creativecommons.org/licenses/by-nc/4.0/">Creative Commons Attribution-NonCommercial license</a>, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.</p>