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Authors
Park, Kyu-Tae
Cho, Dong-Guk
Park, Ji-Woon
Hong, Seunghun
Hwang, Jungho
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Article History
Received: 3 July 2015
Accepted: 23 October 2015
First Online: 8 December 2015
Competing interests
: The authors declare no competing financial interests.
