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Footnotes
Handling editor Anna Maria Geretti
AK and MO contributed equally.
Contributors AK, MO, TT and Y Arima designed the study. AK, MO, TT, Y Arima, TA, HI, TY and MS verified the data. AK, MO, TT, and Y Arima analysed and interpreted the data. AK and MO wrote the first draft of the manuscript. TT, Y Arima, TA, HI, TY, YO, SN, Y Akeda and MS reviewed and provided important comments on the draft manuscript. TY obtained the funding. Y Arima and MS provided administrative or material support. All authors read and approved the manuscript.
Funding This work was supported by grants from the Ministry of Health, Labour and Welfare, Japan (grant no. 21HA1003).
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.
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