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Authors
Hwang, In Cheol
Park, Kwi Hwa
Kim, Jin Joo
Yim, Jun
Ko, Kwang Pil
Bae, Seung Min
Kyung, Sun Young
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Article History
Received: 12 June 2015
Accepted: 1 February 2016
First Online: 22 February 2016
Compliance with Ethical Standards
: This study was approved by the institutional review board of the Gachon University Gil Medical Center, Incheon, Korea (GBIRB2015-13), and was performed in accordance with the tenets of the Declaration of Helsinki. All students provided written informed consent before enrolled in this study.
: No competing financial interest exists, and no funding was received for this study.
