Article History
Received: 17 February 2020
Accepted: 30 July 2020
First Online: 6 August 2020
Compliance with ethical standards
:
: The authors declare no conflicts of interest.
: All procedures performed in studies involving human participants were done so in accordance with the ethical standards of the institutional and/or national research committee (Seoul National University Bundang Hospital, B-2001/586-116) and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual study participants.