Funding for this research was provided by:
Yonsei University College of Medicine (6-2020-0224)
Received: 23 July 2020
Accepted: 26 January 2021
First Online: 8 February 2021
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (Yonsei University Health System, Severance Hospital, Institutional Review Board, 4–2019-0181) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved by the local institutional research committee. All the subjects gave written informed consent, and this study abided by the principles outlined in the Declaration of Helsinki.
: Written informed consent for publication of personal or clinical details along with any identifying images was obtained from all individual participants included in the study.
: All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.