Document is current

Funding

: Yes, received funds/grants/financial support for this article. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2021R1F1A1056145). The author thanks to supporting of the Korean government (MSIT).

Conflicts of Interest

: No conflicts of interest to the best of our knowledge.

Ethical Approval and Consent to Participate

: The author must submit a statement that the study does not require ethical approval and consent to participate with evidence.

Availability of Data and Material

: Not relevant.

Authors Contributions

: I am only the sole author of the article.