Choi, Se Young
Lim, Bumjin
Chi, Byung Hoon
Kim, Jung Hoon
Lee, Wonchul
You, Dalsan
Kim, Choung-Soo
Article History
Received: 29 December 2020
Accepted: 26 March 2021
First Online: 11 June 2021
Declarations
:
: The study protocol was approved by the Institutional Review Board of the Asan Medical Center (2018-1041). All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional Review Board of the Asan Medical Center and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The Institutional Review Board of the Asan Medical Center waived the requirement for informed consent because of the retrospective design of this study.
: Not applicable.
: The authors declare no conflict of interest.