Submitted for Publication: May 27, 2014; final revision received September 2, 2014; accepted September 6, 2014.
Published Online: October 30, 2014. doi:10.1001/jamaophthalmol.2014.4301.
Study concept and design: Hettinga, de Boer.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Hettinga, de Boer.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Hettinga, Scheerlinck.
Obtained funding: Hettinga, de Boer.
Study supervision: Rothova.
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 financially supported by Stichting Uitzicht, the Netherlands.
Role of the Funder/Sponsor: Stichting Uitzicht 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 Rolf Groenwold, MD, PhD, of the Julius Center for Health Sciences for assistance in the statistical analysis. He did not receive compensation for his contribution.