1Department of Internal Medicine, Dong-eui Medical Center, Busan, Korea
2Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
Copyright © 2014 Kosin University School of Medicine Proceedings
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.