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Authors
Hong, Chan-Hwa
Oh, Seung Kyu
Kim, Tae Kyoung
Cha, Yu-Jung
Kwak, Joon Seop
Shin, Jae-Heon
Ju, Byeong-Kwon
Cheong, Woo-Seok
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Article History
Received: 29 June 2015
Accepted: 4 November 2015
First Online: 7 December 2015
Competing interests
: The authors declare no competing financial interests.
