Article History
Received: 21 April 2020
Revised: 9 July 2020
Accepted: 13 July 2020
First Online: 17 August 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Not applicable
: 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. The study protocol was approved by the Institutional Review Board (IRB) of Konkuk University Medical Center (registration number: KUH1100071).
: Informed consent was obtained from all individual participants included in the study.