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Authors
Yong, Seok-Beom
Kim, Hyung Jin
Kim, Jang Kyoung
Chung, Jee Young
Kim, Yong-Hee
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Article History
Received: 7 July 2016
Accepted: 3 January 2017
First Online: 7 February 2017
Competing interests
: The authors declare no competing financial interests.
