Submitted for Publication: November 9, 2012; final revision received June 24, 2013; accepted July 10, 2013.
Published Online: December 5, 2013. doi:10.1001/jamaophthalmol.2013.6046.
Study concept and design: MacLennan, McGwin, Hullett, Owsley.
Acquisition of data: MacLennan, Lolley, Hullett, Owsley.
Analysis and interpretation of data: MacLennan, McGwin, Heckemeyer, Saaddine, Shrestha, Owsley.
Drafting of the manuscript: MacLennan, McGwin, Owsley.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: MacLennan, McGwin.
Obtained funding: Owsley.
Administrative, technical, and material support: Heckemeyer, Lolley, Hullett, Owsley.
Study supervision: Saaddine, Shrestha.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was supported through the Innovative Network for Sight Research (INSIGHT), an initiative of the Centers for Disease Control and Prevention through cooperative agreement 1U58DP002651.
Role of the Sponsor: Representatives from the funding agency did not have access to the data, but had a role in the design and conduct of the study; interpretation of the data; and preparation and review of the manuscript.
Disclaimer: The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.