Received: 13 November 2019
Accepted: 27 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Samsung Medical Center (SMC 2018–09-011) according to the Declaration of Helsinki on reviewing and publishing information from patient’s records. Informed consent was waived because of the retrospective nature of the 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.