. 2013 Dec 28;67(6):431–434. doi: 10.5455/medarh.2013.67.431-434
Copyright: © AVICENA
This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.