Funding for this research was provided by:
National Research Foundation of Korea (NRF-2015R1D1A1A09058505)
Hallym University Medical Center (Hallym University Research Fund)
Text and Data Mining valid from 2018-09-03
Received: 14 November 2017
Accepted: 28 August 2018
First Online: 3 September 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Hallym University Medical Center and adhered to the tenets of the Declaration of Helsinki for research involving human subjects. This study received a waiver of informed consent from the IRB of Hallym University Kangnam Sacred Heart Hospital because this study was a retrospective chart review study.
: Not applicable.
: The authors declare that they have no competing interests.
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