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Article History

Received: 16 September 2021

Accepted: 29 November 2021

First Online: 3 January 2022

Declarations

:

: We excluded personally identifiable information from our research. This study was performed with the approval of the Teikyo University Medical Research Ethics Committee (No. 18–121–2). This is a retrospective study using the residual sample of medical treatment. It was decided that informed consent was unnecessary because samples and information were anonymized and could not be identified by individuals.

: Not applicable.

: The authors declare that they have no competing interests.