. 2013 May 14;8(4):321–326. doi: 10.5114/wiitm.2011.35144
Copyright © 2013 Sekcja Wideochirurgii TChP
This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.