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Authors
Kim, Sangwoo
Jang, Yu-Sin
Ha, Sung-Chul
Ahn, Jae-Woo
Kim, Eun-Jung
Hong Lim, Jae
Cho, Changhee
Shin Ryu, Yong
Kuk Lee, Sung
Lee, Sang Yup
Kim, Kyung-Jin
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Article History
Received: 1 June 2015
Accepted: 19 August 2015
First Online: 22 September 2015
Competing interests
: The authors declare no competing financial interests.
