Accepted for Publication: May 9, 2013.
Published Online: August 14, 2013. doi:10.1001/jamadermatol.2013.5264.
Study concept and design: Armstrong.
Acquisition of data: Armstrong, Robertson.
Analysis and interpretation of data: Armstrong
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: Armstrong, Robertson, Lebwohl.
Statistical analysis: Schupp.
Administrative, technical, and material support: Armstrong.
Study supervision: Armstrong.
Conflict of Interest Disclosures: Dr Armstrong has received research grants or consultant honoraria from Abbott Laboratories, Amgen, Inc, and Janssen Biotech. Dr Lebwohl has been a consultant and/or investigator for Abbott Laboratories, Amgen, Inc, Anacor Pharmaceuticals, Inc, BioLine RX, Ltd, Celgene Corporation, Columbia Laboratories, Inc, Coronado Biosciences, Dermipsor, Ltd, Eli Lilly & Co, Galderma, GlaxoSmithKline-Stiefel, Janssen Ortho Biotech, LEO Pharmaceuticals, Maruho Co, Ltd, Meda Pharmaceuticals, Novartis, Pfizer, Ranbaxy Laboratories, Ltd, Thesan Pharmaceuticals, and Valeant Pharmaceuticals. The other authors reported no disclosures.
Corrections: This article was corrected on November 15, 2013, to fix the Conflict of Interest Disclosures section, and on February 5, 2014, to fix an incorrect key in Figure 5.