. 2014 Sep 3;2014:671706. doi: 10.1155/2014/671706
Copyright © 2014 V. Pastore and F. Bartoli.
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 1.
Appendix with perforation near the tip.