Accepted for Publication: February 14, 2014.
Published Online: June 5, 2014. doi:10.1001/jamaophthalmol.2014.1032.
Study concept and design: Huang, Zhang.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Li, Huang, Xiao, Jia.
Critical revision of the manuscript for important intellectual content: Guo, Zhang.
Statistical analysis: Li, Huang, Xiao, Jia.
Obtained funding: Zhang.
Administrative, technical, or material support: Li, Huang, Xiao, Jia, Guo.
Study supervision: Zhang.
Conflict of Interest Disclosures: None reported.
Funding/Support: The work was supported by grants 81170881 and U1201221 from the National Natural Science Foundation of China, by grant 2010CB529904 from the national 973 Program, by Project 985 of Sun Yat-Sen University, and by fundamental research funds of the State Key Laboratory of Ophthalmology (Dr Zhang).
Role of the Sponsor: The funding sources 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 thank the patients and their family members for their participation.