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Authors
Kwon, Woo-Sung
Rahman, Md Saidur
Ryu, Do-Yeal
Park, Yoo-Jin
Pang, Myung-Geol
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Article History
Received: 16 May 2015
Accepted: 28 September 2015
First Online: 22 October 2015
Competing interests
: The authors declare no competing financial interests.
