Submitted for Publication: August 9, 2013; final revision received December 13, 2013; accepted December 16, 2013.
Published Online: April 17, 2014. doi:10.1001/jamaophthalmol.2014.369.
Study concept and design: Jampel, Friedman, Quigley, Gower.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Jampel, Friedman, Shekhawat, Whiteside-de Vos.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Cassard, Gower.
Administrative, technical, or material support: Jampel, Shekhawat, Whiteside-de Vos.
Study supervision: Quigley, Gower.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grant U58DP002653 from the Centers for Disease Control and Prevention, unrestricted funds from Livingston and Saranne Kosberg and William T. Forrester, a Special Scholars Award from Research to Prevent Blindness (Dr Gower), and training grant T32 EY 07127 from the National Eye Institute, Clinical Trials Training Program in Vision Research (Dr Whiteside).
Role of the Sponsors: The funding sources had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.