. 2013 Aug 31;31(2):157–162. doi: 10.5534/wjmh.2013.31.2.157
Copyright © 2013 Korean Society for Sexual Medicine and Andrology
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.