Submitted for Publication: August 29, 2013; final revision received December 16, 2013; accepted December 19, 2013.
Published Online: April 17, 2014. doi:10.1001/jamaophthalmol.2014.266.
Study concept and design: Schaal, Kaplan.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Schaal, Kagan.
Critical revision of the manuscript for important intellectual content: Schaal, Wang, Chan, Kaplan.
Statistical analysis: Schaal.
Obtained funding: Schaal.
Administrative, technical, and material support: Schaal, Kagan, Wang.
Study supervision: Schaal, Chan, Kaplan.
Conflict of Interest Disclosures: None reported.
Funding/Support: The work was supported in part by an unrestricted grant from Research to Prevent Blindness, Inc and Kentucky Research Challenge Trust Fund (Dr Kaplan).
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.