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Authors
Kim, Aram
Kim, Myong
Jeong, Se Un
Song, Cheryn
Cho, Yong Mee
Ro, Jae Yoon
Ahn, Hanjong
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More Information
Article History
Received: 2 October 2017
Accepted: 24 January 2018
First Online: 2 February 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Asan Medical Center, University of Ulsan College of Medicine (2014-0980).
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
