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Article History

Received: 11 October 2022

Accepted: 27 January 2023

First Online: 8 February 2023

Declarations

:

: All authors have no conflicts of interest to declare that are relevant to the content of this article.

: This study was conducted according to the principles of the Declaration of Helsinki. Approval was obtained from the local scientific ethics committees (Seoul hospital: 2017-02-002, Bucheon hospital: 2017-03-004, Cheonan hospital: 2017-03-031-024, Gumi hospital: 2017-03-031-002).

: We were been granted a waiver of informed consent by the local scientific ethics committees for the following reasons; (1) The study did not conduct genetic testing of human origin. (2) The subject of the study is human-derived, and the identification of the samples is not possible because the information of the subject was not provided or was not revealed to all research-related persons. (3) Information was coded and provided to the researcher without the subject identification record, or the personal information was processed and secured so that it was impossible to identify it by an impartial third party. (4) We had appropriate management guidelines and procedures for samples to prevent personal information exposure.