Text and Data Mining valid from 2020-03-27
Received: 1 October 2019
Accepted: 16 March 2020
First Online: 27 March 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Samsung Medical Center (SMC 2018–07-154). Patients’ records were reviewed and published according to the Declaration of Helsinki. Informed consent was waived because of the retrospective nature of this study.
: Not applicable. This study does not contain individual or personal data in any form, including individual details, images, or videos.
: The authors declare that they have no competing interests.