Funding for this research was provided by:
National Research Foundation (2017R1D1A1B03032985)
Received: 10 December 2020
Revised: 13 July 2021
Accepted: 22 July 2021
First Online: 18 August 2021
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required. The Institutional Review Board of Seoul National University Hospital in South Korea granted a waiver of consent for this retrospective chart review study.
: The authors declare no competing interests.