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Authors
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Funding
Funding for this research was provided by:
Japan Society for the Promotion of Science (JP17K09209)
Center Administrative Expense from Nara Medical University
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Article History
Received: 28 August 2021
Accepted: 3 November 2021
First Online: 19 November 2021
Declarations
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: In this study, we received approval of use for academic purposes from the Japanese Ministry of Health, Labour and Welfare (approval number 20009), based on Article 36 of the Statistics Law of Japan. The data provided had personally identifiable information removed. Consent to participate is not applicable for studies using existing data.
: Not applicable.
: K.S. received research grants from YKK AP Inc.; Ushio Inc.; Tokyo Electric Power Company; En-viroLife Research Institute Co., Ltd.; Sekisui Chemical Co., Ltd.; LIXIL Corp.; and KYOCERA Corp. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. The other authors declare no conflicts of interest.
