Submitted for Publication: April 8, 2012; final revision received June 21, 2012; accepted June 24, 2012.
Author Contributions: Dr Binenbaum 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.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grants K12 EY015398 and P30 EY01583-26 from the National Institutes of Health.
Role of the Sponsors: The funding organization has played no role in the study design, conduct, analysis, or manuscript preparation.
Previous Presentations: Presented in part at the 2012 Annual Meeting of the American Association of Pediatric Ophthalmology and Strabismus; March 27, 2012; San Antonio, Texas, and the 2012 Annual Meeting of the Pediatric Academic Societies; April 29, 2012; Boston, Massachusetts.
Additional Contributions: Haresh Kirpalani, MD, MSc, reviewed the manuscript, and Karen Karp, BSN, Emidio Sivieri, MSE, and Toni Mancini, BSN, helped with data collection.