Submitted for Publication: January 15, 2015; final revision received April 13, 2015; accepted April 19, 2015.
Published Online: June 4, 2015. doi:10.1001/jamaophthalmol.2015.1671.
Study concept and design: Blumberg, Cioffi, De Moraes.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Blumberg, Prager, Cioffi, De Moraes.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Blumberg, Prager, De Moraes.
Obtained funding: Blumberg, Cioffi.
Administrative, technical, or material support: Blumberg.
Study supervision: Blumberg, Liebmann, Cioffi, De Moraes.
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: This study was supported by an unrestricted grant from the Irving A. Hansen Memorial Foundation (Blumberg).
Role of the Funder/Sponsor: The funder 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.
Additional Contributions: We acknowledge Matt Neidell, PhD, Mailman School of Public Health, Columbia University Medical Center, for technical guidance. He received a consulting fee.