Acknowledgement
This study was supported by a National Grantin-Aid for the National Center for Child Health and Development (grant number 2019A-3 [to KA]) and a Health and Labour Sciences Research Grant for Research on Intractable Disease (grant number 20FC0201 [to KA]) from the Japanese Ministry of Health, Labour and Welfare. The study sponsors had no role in the study design; collection, analysis, and interpretation of data; writing of the report; or decision to submit the paper for publication.
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