Published Online: September 15, 2016. doi:10.1001/jamaophthalmol.2016.3417
Concept and design: Sun, Wu.
Acquisition, analysis, or interpretation of data: Ke, Sun, Zhong, Guan, Zhang, Tan.
Drafting of the manuscript: Ke, Sun, Guan, Zhang, Tan.
Critical revision of the manuscript for important intellectual content: Wu, Zhong.
Statistical analysis: Sun.
Administrative, technical, or material support: All authors.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Additional Contributions: We thank all the related laboratory and administrative personnel at Guangdong Provincial Center for Disease Control and Prevention and Jiangmen Center for Disease Control and Prevention for their contribution in follow-up investigation.