Accepted for Publication: August 3, 2011.
Published Online: November 7, 2011. doi:10.1001/archpediatrics.2011.197
Author Contributions: Study concept and design: Lozoff and Castillo. Acquisition of data: Castillo. Analysis and interpretation of data: Lozoff, Clark, and Smith. Drafting of the manuscript: Lozoff, Clark, and Smith. Critical revision of the manuscript for important intellectual content: Lozoff, Castillo, Clark, and Smith. Statistical analysis: Smith. Obtained funding: Lozoff. Administrative, technical, and material support: Lozoff, Castillo, and Clark. Study supervision: Lozoff and Castillo.
Financial Disclosure: None reported.
Funding/Support: This study was supported by grants HD14122 and HD33487 from the National Institutes of Health.
Role of the Sponsor: The National Institutes of Health had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
Previous Presentation: The study was presented in platform format at the Pediatric Academic Societies Annual Meeting; May 5, 2008; Honolulu, Hawaii.
Online-Only Material: This article is featured in the Archives Journal Club. Go to here to download teaching PowerPoint slides.
Additional Contributions: We thank the study families and children for their continued participation and project psychologists for their dedicated effort and high degree of professionalism. Infant formulas (Similac) were donated by Ross Laboratories.