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1Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.
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Address for Correspondence: Beom Sun Chung, MD. Department of Anatomy, Ajou University School of Medicine, 164 World Cup-ro, Yeongtong-gu, Suwon 16499, Republic of Korea. bschung@ajou.ac.kr
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Corresponding author.
Received 2019 Apr 2; Accepted 2019 Apr 2; Collection date 2019 Apr 8.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://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.