. 2013 Dec 1;8:186. doi: 10.1186/1750-1172-8-186
Copyright © 2013 Michaud et al.; licensee BioMed Central Ltd.
This is an open access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
Endoscopic aspect of a CES.