. 2012 Jun 30;45(2):97–102. doi: 10.5115/acb.2012.45.2.97
Copyright © 2012. Anatomy & Cell Biology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.