Kim, Seung-Kook
Kang, Sang-Soo
Hong, Young-Ho
Park, Seung-Woo
Lee, Su-Chan
Article History
Received: 30 November 2017
Accepted: 20 January 2018
First Online: 31 January 2018
Ethics approval and consent to participate
: All participating institutions received approval from their respective institutional review board (KNU07-1112), and all patients provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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