Submitted for Publication: January 21, 2013; final revision received March 11, 2013; accepted March 19, 2013.
Published Online: August 1, 2013. doi:10.1001/jamaophthalmol.2013.4399.
Study concept and design: Vehof, Harris, Williams, McMahon, Spector, Hammond.
Acquisition of data: Vehof, Kozareva, Harris, Nessa, Williams, Fahy, Direk.
Analysis and interpretation of data: Vehof, Hysi, Bennett, McMahon, Hammond.
Drafting of the manuscript: Vehof, Harris, Fahy, Direk, Hammond.
Critical revision of the manuscript for important intellectual content: Vehof, Kozareva, Hysi, Nessa, Williams, Bennett, McMahon, Fahy, Spector.
Statistical analysis: Vehof, Hysi, Hammond.
Obtained funding: McMahon, Spector, Hammond.
Administrative, technical, and material support: Vehof, Kozareva, Harris, Nessa, Williams, Hammond.
Study supervision: Vehof, Williams, McMahon, Spector, Hammond.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the Wellcome Trust, the Department of Health via the National Institute for Health Research (NIHR) Clinical Research Facility at Guy’s & St Thomas’ NHS Foundation Trust, NIHR Biomedical Research Centre based at Guy’s and St Thomas’ NHS Foundation Trust and King’s College London, and Pfizer Pharmaceuticals, which paid for collection of pain phenotypes via an unrestricted grant. Dr Hammond is an NIHR Senior Research Fellow and Dr Spector is an NIHR Senior Investigator.