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Authors
Park, S. J.
Hong, J. T.
Choi, S. J.
Kim, H. S.
Park, W. K.
Han, S. T.
Park, J. Y.
Lee, S.
Kim, D. S.
Ahn, Y. H.
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Article History
Received: 26 November 2013
Accepted: 28 April 2014
First Online: 16 May 2014
Competing interests
: The authors declare no competing financial interests.
