Submitted for Publication: March 14, 2013; final revision received May 29, 2013; accepted June 11, 2013.
Published Online: November 21, 2013. doi:10.1001/jamaophthalmol.2013.5692.
Study concept and design: Schoenberger, Kim.
Acquisition of data: All authors.
Analysis and interpretation of data: Schoenberger, Kim, Calcutt.
Drafting of the manuscript: Schoenberger, Kim, Sheng.
Critical revision of the manuscript for important intellectual content: Kim, Calcutt.
Statistical analysis: Schoenberger, Kim, Calcutt.
Obtained funding: Kim.
Administrative, technical, or material support: Kim, Sheng, Calcutt.
Study supervision: Kim.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by Research to Prevent Blindness (unrestricted grant to the Vanderbilt University School of Medicine Department of Ophthalmology and Visual Sciences) and by the National Center for Advancing Translational Sciences (CTSA award UL1TR000445).
Role of the Sponsor: The funding agencies 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; and decision to submit the manuscript for publication.