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1Department of Internal Medicine, Endocrine Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2The Graduated School Yonsei University, Seoul, Korea.
3Department of Internal Medicine, Kwandong University College of Medicine, Incheon, Korea.
4Department of General Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
Copyright © 2015 Korean Endocrine Society
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.
CONFLICTS OF INTEREST: No potential conflict of interest relevant to this article was reported.