Footnotes

• Contributors RK and KB contributed to the conception and design of the study. RK, SC, NK, KP, HS, HL, HL and KB contributed to data acquisition, analysis and interpretation. RK contributed to statistical analysis. RK contributed to drafting of the manuscript. All authors contributed to r evising the manuscript.

• Funding This work was supported by the National Research Foundation grant funded by the Korea government (MSIT) (2021R1C1C1011822).

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.

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