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Authors
Seo, Moon-Hyeong
Park, Jeongbin
Kim, Eunkyung
Hohng, Sungchul
Kim, Hak-Sung
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Article History
Received: 26 December 2013
Accepted: 24 March 2014
First Online: 24 April 2014
Competing interests
: The authors declare no competing financial interests.
