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Authors
Myung, Dae-Seong
Lee, Wan-Sik
Park, Young-Lan
Kim, Nuri
Oh, Hyung-Hoon
Kim, Mi-Young
Oak, Chan-Young
Chung, Cho-Yun
Park, Hyung-Chul
Kim, Jong-Sun
Cho, Sung-Bum
Kweon, Sun-Seog
Joo, Young-Eun
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Article History
Received: 18 September 2014
Accepted: 7 May 2015
First Online: 22 June 2015
Competing interests
: The authors declare no competing financial interests.
