Submitted for Publication: April 3, 2013; final revision received July 3, 2013; accepted July 26, 2013.
Published Online: December 26, 2013. doi:10.1001/jamaophthalmol.2013.6241.
Study concept and design: Rautiainen, Wolk.
Acquisition of data: Rautiainen, Wolk.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Rautiainen.
Critical revision of the manuscript for important intellectual content: Lindblad, Morgenstern, Wolk.
Statistical analysis: Rautiainen.
Obtained funding: Wolk.
Administrative, technical, and material support: Wolk.
Study supervision: Morgenstern, Wolk.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the Swedish Research Council/Medicine and Swedish Council for Working Life and Social Research, Stockholm, Sweden.
Role of the Sponsor: The funding organizations had no role in 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.