Text and Data Mining valid from 2019-07-10
Received: 14 May 2019
Accepted: 18 June 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Seoul National University, Bundang Hospital (IRB No. B-1901-514-103).
: Consent for publication was obtained.
: No potential conflict of interest relevant to this article was reported.