Ko, Byuk Sung
Ryoo, Seung Mok
Ahn, Shin
Sohn, Chang Hwan
Seo, Dong-Woo
Kim, Won Young
Article History
Received: 6 August 2015
Accepted: 19 July 2016
First Online: 26 July 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional or national research committees and with the 1964 Declaration of Helsinki and its later amendments, or comparable ethical standards. This article does not contain any studies with human participants or animals performed by any of the authors.
: None.
: The authors declare that they had no funding source.
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