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Authors
Suh, Byeong-Chan
Kim, Jae H.
Hwang, Ji Hyun
Shim, Myeong-Shik
Kim, Nack J.
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Article History
Received: 23 November 2015
Accepted: 12 February 2016
First Online: 1 March 2016
Competing interests
: The authors declare no competing financial interests.
