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Authors
Kang, Min-Young
Yoo, Soo-Cheul
Kwon, Hye-Young
Lee, Byoung-Doo
Cho, Jung-Nam
Noh, Yoo-Sun
Paek, Nam-Chon
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Article History
Received: 28 October 2014
Accepted: 17 March 2015
First Online: 12 May 2015
Competing interests
: The authors declare no competing financial interests.
