Submitted for Publication: October 7, 2013; final revision received January 28, 2014; accepted January 31, 2014.
Published Online: July 17, 2014. doi:10.1001/jamaophthalmol.2014.2213.
Study concept and design: Sherrod, Frick, Ramulu.
Acquisition, analysis, or interpretation of data: Sherrod, Vitale, Ramulu.
Drafting of the manuscript: Sherrod.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Sherrod.
Administrative, technical, or material support: Sherrod, Vitale.
Study supervision: Vitale, Ramulu.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grant EY018595 from the National Institutes of Health and Research to Prevent Blindness.
Role of the Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.