Yoon, T.
Ahn, S. S.
Pyo, J. Y.
Song, J. J.
Park, Y.-B.
Lee, S.-W.
Article History
Accepted: 30 November 2020
First Online: 18 December 2020
Compliance with ethical guidelines
:
: T. Yoon, S. S. Ahn, J. Y. Pyo, J. J. Song, Y.-B. Park and S.-W. Lee declare that they have no competing interests.
: All procedures performed in studies involving human participants or on human tissue were in accordance with the ethical standards of the institutional and/or national research committee and with the 1975 Helsinki declaration and its later amendments or comparable ethical standards. Approval was granted by the Ethics Committee of Severance Hospital (4-2016-0901). Informed consent was obtained from all individual participants included in the study.