Author Contributions: Mr Klein had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Schuster, Chung, Garfield.
Acquisition of data: Schuster, Chung, Garfield.
Analysis and interpretation of data: Schuster, Chung, Elliott, Garfield, Vestal, Klein.
Drafting of the manuscript: Schuster, Chung, Vestal.
Critical revision of the manuscript for important intellectual content: Schuster, Chung, Elliott, Garfield, Vestal, Klein.
Statistical analysis: Schuster, Chung, Elliott, Klein.
Obtained funding: Schuster, Chung.
Study supervision: Schuster.
Financial Disclosures: None reported.
Funding/Support: This study was supported in part by grants R21 HD052586 from the National Institutes of Health and U48/DP000056 from the Centers for Disease Control and Prevention, RAND Health, RAND Institute for Civil Justice, and the California Endowment.
Role of the Sponsors: The funding organizations had no role in the design and conduct of the study, in the collection, management, analysis, or interpretation of the data, or in the preparation, review, or approval of the manuscript.
Additional Contributions: We thank Children's Memorial Hospital, Chicago, Illinois, and Mattel Children's Hospital, University of California, Los Angeles (UCLA), for providing administrative data for the study; the RAND Survey Research Group for data collection; the UCLA/RAND Work-Family Advisory Board for advice during questionnaire development; the UCLA/RAND Center for Adolescent Health Promotion and the Evanston Northwestern Healthcare Research Institute for administrative and research assistance; and Scott Stephenson, BA, and Jacquelyn Chou, BA (RAND) for manuscript assistance. Mr Stephenson and Ms Chou were both paid by the grant funding that supported the study.