. 2009 Aug 11;2009:281615. doi: 10.1155/2009/281615
Copyright © 2009 L. M. Ellingsen and J. L. Prince.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
The hard segmentation of two different subjects.