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Authors
Lee, Mi-Kyung
Kwon, Nak-Jung
Lee, Im-Soon
Jung, Seunho
Kim, Sun-Chang
Yu, Jae-Hyuk
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Article History
Received: 21 March 2016
Accepted: 16 May 2016
First Online: 1 July 2016
Competing interests
: The authors declare no competing financial interests.
