Article History
Received: 30 January 2022
Accepted: 29 April 2022
First Online: 19 July 2022
Declarations
:
: The authors have no relevant financial or non-financial interests to disclose.
: This study was approved by the Ethical Review Committee of Yamagata University Faculty of Medicine for epidemiological research (approval number: 2021 − 125).
: The requirement for written informed consent was waived because of the retrospective nature of the study.