Acknowledgments
We would like to thank the staff at the National Center for Child Health
and Development. The authors also thank the medical editors from the
Division of Education for Clinical Research at the National Center for
Child Health and Development for professionally editing this manuscript.
This study was supported in part by a grant from the National Center for
Child Health and Development (grant no, 2020A-1) and by the Japan
Society for the Promotion of Science through Grants-in-Aid for
Scientific Research (KAKENHI) (grant no, 19K17316).