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Authors
Jung, Eun Joo
Chung, Ky Hyun
Bae, Dong-Won
Kim, Choong Won
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Article History
Received: 17 August 2015
Revised: 29 December 2015
Accepted: 8 January 2016
First Online: 27 May 2016
Competing interests
: The authors declare no conflict of interest.
