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Authors
Kim, Dong-Ju
Kim, Hyo-Joong
Seo, Ki-Won
Kim, Ki-Hyun
Kim, Tae-Wong
Kim, Han-Ki
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Article History
Received: 30 July 2015
Accepted: 21 October 2015
First Online: 19 November 2015
Competing interests
: The authors declare no competing financial interests.
