Funding for this research was provided by:
National Research Foundation of Korea (2016R1D1A1B03933410, 2013R1A6A3A04059017, 2018R1A2B6004608)
National Cancer Center (NCC-1810220-01)
Text and Data Mining valid from 2018-08-22
Received: 5 April 2017
Accepted: 15 August 2018
First Online: 22 August 2018
Ethics approval and consent to participate
: The Institutional Review Board of Gangnam CHA hospital (IRB No. GCI-16-22) granted ethics approval and waived informed consent.
: Not applicable
: The authors declare that they have no competing interests.
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