Submitted for Publication: March 15, 2013; final revision received June 14, 2013; accepted September 9, 2013.
Published Online: January 16, 2014. doi:10.1001/jamaophthalmol.2013.7612.
Study concept and design: N. R. Kim, C. Y. Kim.
Acquisition of data: N. R. Kim, Chin, C. Y. Kim.
Analysis and interpretation of data: N. R. Kim, Park, Suh, C. Y. Kim.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: N. R. Kim, C. Y. Kim.
Statistical analysis: N. R. Kim, Park, Suh.
Obtained funding: C. Y. Kim.
Administrative, technical, and material support: N. R. Kim, Chin, C. Y. Kim.
Study supervision: C. Y. Kim.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the Korea Health Technology R&D Project, Ministry of Health and Welfare, Republic of Korea (grant A101727) and by Inha University research grant INHA-46428.
Role of the Sponsor: The funding agencies had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.