Submitted for Publication: February 6, 2014; final revision received November 3, 2014; accepted November 4, 2014.
Published Online: January 2, 2015. doi:10.1001/jamaophthalmol.2014.5312.
Study concept and design: Zhao, Dong.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Zhao, Qu.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Qu.
Obtained funding: Zhao.
Administrative, technical, or material support: All authors.
Study supervision: Zhao, Dai, Dong, Kang, Yang, P. Zhou, Pan, L. Zhang, P. Liu, Jiao, Xiong, Tian, Lu, Yu, X. Li.
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 research was supported by Capital Health Research and Development of Special Funding grant D101100050010026 and National Science and Technology Major Project grant 2011ZX09302-007-02.
Role of the Funder/Sponsor: The funders/sponsors 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.