Accepted for Publication: September 1, 2018.
Corresponding Author: Sharon Levy, MD, MPH, Division of Adolescent/Young Adult Medicine, Boston Children’s Hospital, 300 Longwood Ave, Boston, MA 02115 (sharon.levy@childrens.harvard.edu).
Published Online: December 17, 2018. doi:10.1001/jamapediatrics.2018.3811
Author Contributions: Both authors had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Concept and design: Both authors.
Acquisition, analysis, or interpretation of data: Both authors.
Drafting of the manuscript: Both authors.
Critical revision of the manuscript for important intellectual content: Both authors.
Statistical analysis: Weitzman.
Obtained funding: Both authors.
Administrative, technical, or material support: Levy.
Supervision: Levy.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was funded by grant CNF20140273 from the Conrad N. Hilton Foundation.
Role of the Funder/Sponsor: The funder 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.