Author Contributions: Dr Ludwig 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: Ebbeling, Ludwig.
Acquisition of data: Ebbeling, Leidig, Lovesky.
Analysis and interpretation of data: Ebbeling, Feldman, Ludwig.
Drafting of the manuscript: Ebbeling, Feldman, Ludwig.
Critical revision of the manuscript for important intellectual content: Leidig, Feldman, Lovesky.
Statistical analysis: Ebbeling, Feldman.
Obtained funding: Ebbeling, Ludwig.
Administrative, technical, or material support: Leidig, Lovesky.
Study supervision: Ebbeling, Ludwig.
Financial Disclosures: Dr Ludwig reported being the author of a book on childhood obesity (Ending the Food Fight: Guide Your Child to a Healthy Weight in a Fast Food/Fake Food World). No other authors reported disclosures.
Funding/Support: This study was supported by grant R01 DK59240 from the National Institute of Diabetes and Digestive and Kidney Diseases (Bethesda, Md); the Charles H. Hood Foundation (Boston, Mass); and grant M01 RR02172 awarded by the National Center for Research Resources (Bethesda, Md) to support the General Clinical Research Center at Children's Hospital (Boston, Mass).
Role of the Sponsor: The funding organizations played no role in design and conduct of the study; collection, management, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Acknowledgment: We thank Linda Seger-Shippee for conducting the 24-hour recall interviews, Erica Garcia-Lago, BA, for organizing daily study operations and data management, Victoria Turbini, RN, MS, for data collection, Diane DiFabio and Jessica Sexton, BS, for performing the dual-energy x-ray absorptiometry scans, Syed Rafi, PhD, Gary Bradwin, BS, and Kristen Barry, BS, for processing and analysis of blood samples, and Hope Forbes, BA, for assistance with data management (all from Children's Hospital, Boston, Mass, and received compensation through their regular salaries); Niki Philippas, RD (Athens, Greece, formerly at Children's Hospital, Boston, she received compensation through her regular salary at Children's Hospital), Kelly Sinclair, MS, RD (Children's National Medical Center, formerly at Children's Hospital, Boston, she received compensation through her regular salary at Children's Hospital), and Kamryn Eddy, MA (University of Chicago, formerly at Children's Hospital, Boston, she did not receive compensation because she was a graduate student) for their roles in developing and delivering the dietary interventions; Stacy Schuller, BA (Simons College, Boston, formerly at Children's Hospital, Boston, she did not receive compensation because she was a student intern), and Paulette Kowalski, MS (Boston Spine Group, formerly at Children's Hospital, Boston, she did not receive compensation because she was a student intern) for assistance in compiling process data.