Text and Data Mining valid from 2018-10-01
Received: 13 February 2018
Accepted: 18 September 2018
First Online: 1 October 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Kangbuk Samsung Hospital, the Sungkyunkwan University of Korea, on 8 August 2017 (KBSMC 2017–07-047). The institutional review board waived the need for written informed consent from the participants as the project was deemed to be in the low or negligible risk category in accordance with the Korean National Bioethics Committee ‘National Statement on Ethical Conduct in Human Research’, 2017.
: Not applicable.
: The authors declare that they have no competing interests.
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