Submitted for Publication: March 2, 2011; final revision received July 7, 2011; accepted July 18, 2011.
Published Online: September 12, 2011. doi:10.1001/archophthalmol.2011.295
Author Contributions: All of the authors had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Financial Disclosure: None reported.
Funding/Support: This work was supported by Covance Laboratories, Comparative Ophthalmic Research Laboratories, National Institutes of Health grant P30 EY016665 (Dr Nork), and Research to Prevent Blindness.
Additional Contributions: We thank Sherry Ellefson, BS, Rebecca Slimmer, BS, Katherine Johnson, BS, Amanda Harvey, BS, and Jennifer Szurka for their work on the project. Mary A. Roach, PhD, reviewed the manuscript.