Funding for this research was provided by:
The National R & D Program for Cancer Control, Ministry of Health & Welfare, Korea (1720180)
Text and Data Mining valid from 2019-04-11
Received: 10 September 2018
Accepted: 27 March 2019
First Online: 11 April 2019
Ethics approval and consent to participate
: The study was approved and the need for informed consent was waived by the institutional review board of Samsung Medical Center (2017–07-068).
: Not applicable.
: The authors declare that they have no competing interests.
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