Funding for this research was provided by:
Korea Health Technology R&D Project through the Korea Health Industry Development Institute (HI19C1235)
Received: 24 April 2021
Accepted: 9 November 2021
First Online: 16 November 2021
: The research protocol was approved by the Institutional Review Board (IRB) of Severance Hospital (IRB No. 4-2017-1196). The need for informed consent was waived by the IRB of Severance Hospital due to the retrospective nature of the study. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.