Submitted for Publication: September 14, 2013; final revision received January 4, 2104; accepted January 6, 2014.
Published Online: May 1, 2014. doi:10.1001/jamaophthalmol.2014.404.
Study concept and design: Din, Taylor, Isa, Bar, Talat, Lightman.
Acquisition, analysis, or interpretation of data: Din, Taylor, Tomkins-Netzer, Bar, Talat, Lightman.
Drafting of the manuscript: Din, Bar, Lightman.
Critical revision of the manuscript for important intellectual content: Din, Taylor, Isa, Tomkins-Netzer, Talat, Lightman.
Statistical analysis: Din, Taylor, Tomkins-Netzer, Talat.
Obtained funding: Lightman.
Administrative, technical, or material support: Isa, Barj, Lightman.
Study supervision: Taylor, Lightman.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported in part by doctoral scholarships funded by the government of Malaysia (Drs Din and Isa) and by the UK National Institute of Health Research (Dr Taylor).
Role of the Sponsor: The funding sources had no role in the design or conduct of this study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Previous Presentation: This paper was presented in part at the Annual Congress of the Royal College of Ophthalmology; May 16, 2012; Liverpool, England.