Accepted for Publication: September 7, 2011.
Published Online: November 21, 2011. doi:10.1001/archdermatol.2011.355
Author Contributions: All authors had full access to all of the data from the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Margolis, Metlay, Xie, DiRienzo, and Edelstein. Acquisition of data: Margolis, Papadopoulos, DiRienzo, and Edelstein. Analysis and interpretation of data: Margolis, Fanelli, Kupperman, Metlay, and Xie. Drafting of the manuscript: Margolis, Fanelli, Kupperman, and DiRienzo. Critical revision of the manuscript for important intellectual content: Margolis, Fanelli, Kupperman, Papadopoulos, Metlay, Xie, DiRienzo, and Edelstein. Statistical analysis: Margolis, Kupperman, and Xie. Obtained funding: Margolis. Administrative, technical, and material support: Margolis, Fanelli, Kupperman, Papadopoulos, DiRienzo, and Edelstein. Study supervision: Margolis and DiRienzo.
Financial Disclosure: None reported.
Funding/Support: This study was supported by National Institutes of Health grant R01AR051185.
Role of the Sponsors: The sponsors had no role in the design and conduct of the study; in the collection, analysis and interpretation of data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: Martha A. C. Edelstein, BA, and Andrew Baltus, BA, provided excellent technical assistance.