Submitted for Publication: August 6, 2014; final revision received December 14, 2014; accepted December 17, 2014.
Published Online: February 19, 2015. doi:10.1001/jamaophthalmol.2015.22.
Study concept and design: Chen, Han, Goldberg.
Acquisition, analysis, or interpretation of data: Chen, Han, Goldberg.
Drafting of the manuscript: Chen.
Critical revision of the manuscript for important intellectual content: Chen, Han, Goldberg.
Statistical analysis: Tian, Muñoz.
Administrative, technical, or material support: Goldberg.
Study supervision: Goldberg.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest, and none were reported.
Funding/Support: The biostatistical analysis was performed by the Wilmer Biostatistics Consulting Center, which is funded by Wilmer Biostatistics Core Grant EY01765.
Role of the Funder/Sponsor: The funding source 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.