Funding for this research was provided by:
Ministry of Education, Science and Technology (2018R1A2B6002920)
Received: 26 August 2019
Accepted: 11 February 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of Samsung Medical Center, Seoul, Korea. The written informed consent was waived by the Institutional Review Board for this retrospective study. The data used in this study was de-identified.
: Not applicable.
: The authors declare that they have no competing interests.