Funding for this research was provided by:
Ministry of Science ICT and Future Planning (NRF-2017R1C1B5018080)
Article History
Received: 26 February 2017
Accepted: 4 January 2018
First Online: 15 January 2018
Ethics approval and consent to participate
: This is a retrospective study, thus any written informed consents from the patients were waived. This study was performed according to the Declaration of Helsinki, and the protocol was approved by the Institutional Review Board (IRB) of Pusan National University Hospital, College of Medicine, the Pusan National University of Korea (IRB#E-2014121).
: Not applicable. No personal information is included in this study.
: No authors have conflicts of interest or proprietary interests in the contents of this manuscript.
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