Funding for this research was provided by:
the Basic Science Research Program through the National Research Foundation of Korea (2015R1A1A1A05001173)
the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (HI15C0810)
Text and Data Mining valid from 2018-08-10
Received: 29 July 2017
Accepted: 2 July 2018
First Online: 10 August 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Korea University Medical Center (KUGH16284-001), and anonymized and deidentified information was used for the analyses; thus, informed consent was not required.
: The authors declare that they have no competing interests.
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