Department of Otorhinolaryngology-Head and Neck Surgery, Catholic Kwandong University College of Medicine, Incheon, Korea
Copyright © 2018 by The Korean Balance Society. All rights reserved.
This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.