Published Online: August 21, 2014. doi:10.1001/jamaophthalmol.2014.2860.
Study concept and design: M. J.Kim, S. H. Kim, Hwang, D. M. Kim.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: M. J. Kim, S. J. Kim, D. M. Kim.
Critical revision of the manuscript for important intellectual content: M. J. Kim, Hwang, Park, T.-W., Kim.
Statistical analysis: M. J. Kim, S. H. Kim.
Administrative, technical, or material support: T.-W. Kim.
Study supervision: Hwang, Park, D. M. Kim.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grant 16-2013-6 from the SK Telecom Research Fund.
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.
Correction: This article was corrected on August 26, 2014, for a typographical error in the Abstract.