Author Contributions: Drs Amori and Pittas 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.
Study concept and design: Amori, Pittas.
Acquisition of data: Amori, Pittas.
Analysis and interpretation of data: Amori, Lau, Pittas.
Drafting of the manuscript: Amori, Pittas.
Critical revision of the manuscript for important intellectual content: Amori, Lau, Pittas.
Statistical analysis: Lau, Pittas.
Obtained funding: Pittas.
Administrative, technical or material support: Amori.
Study supervision: Lau, Pittas.
Financial Disclosures: None reported.
Funding/Support: This work was supported by grant K23 DK61506 (to Dr Pittas) from the National Institute of Diabetes and Digestive and Kidney Diseases and by a grant to the Dr Gerald J. and Dorothy R. Friedman New York Foundation for Medical Research (to Dr Amori).
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretations of the data; or preparation, review, or approval of the manuscript.
Additional Contribution: We thank Thomas Trikalinos, MD, Institute for Clinical Research and Health Policy Studies, Tufts-New England Medical Center, Boston, Massachusetts, for help with the statistical analyses. Dr Trikalinos did not receive compensation for his work.