Accepted for Publication: March 15, 2011.
Author Contributions: Dr Taylor had full access to all 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: Taylor, Klein, Anselmo, Minich, Espy, and Hack. Acquisition of data: Taylor, Klein, and Hack. Analysis and interpretation of data: Taylor, Klein, Anselmo, Minich, Espy, and Hack. Drafting of the manuscript: Taylor and Hack. Critical revision of the manuscript for important intellectual content: Taylor, Klein, Minich, Espy, and Hack. Statistical analysis: Taylor and Minich. Obtained funding: Taylor, Minich, Espy, and Hack. Administrative, technical, and material support: Taylor, Anselmo, and Hack. Study supervision: Taylor, Klein, Minich, and Hack.
Financial Disclosure: None reported.
Funding/Support: This work was funded by grant HD050309 from the National Institutes of Health (principal investigator, Dr Taylor), which provided financial support for the design and conduct of the study.
Additional Contributions: Anne Birnbaum, AA, Elizabeth Roth, PhD, Dan Maier, MA, Andrea Barkoukis Gefteas, MS, Michelle R. Jacobs, MA, Alice Kostiuc, BA, and Ketrin Lengu, BA, assisted in recruitment, data collection, and coding.