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CME Disclosure Statement: Unless noted, all individuals in control of content reported no relevant financial relationships. If applicable, all relevant financial relationships have been mitigated.
Accepted for Publication: October 27, 2021.
Published Online: January 10, 2022. doi:10.1001/jamapediatrics.2021.5698
Corresponding Author: Emily C. Hanno, PhD, Graduate School of Education, Harvard University, 14 Appian Way, Cambridge, MA 02138 (email@example.com).
Author Contributions: Dr Hanno and Ms Fritz had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Concept and design: All authors.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Hanno.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Hanno, Fritz.
Obtained funding: Jones, Lesaux.
Administrative, technical, or material support: All authors.
Supervision: Jones, Lesaux.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by funding from the Saul Zaentz Charitable Foundation to the Saul Zaentz Early Education Initiative at the Harvard Graduate School of Education (Drs Jones and Lesaux).
Role of the Funder/Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We thank Abt Associates for their ongoing collaboration and support of data collection for the Early Learning Study at Harvard. We thank the families and children for their continued participation in this study.
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