Accepted for Publication: November 28, 2011.
Author Contributions: Dr Qureshi had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Li, Han, and Qureshi. Acquisition of data: Li and Qureshi. Analysis and interpretation of data: Li, Han, and Qureshi. Drafting of the manuscript: Li and Qureshi. Critical revision of the manuscript for important intellectual content: Li, Han, and Qureshi. Statistical analysis: Li, Han, and Qureshi. Obtained funding: Qureshi. Study supervision: Qureshi.
Financial Disclosure: Dr Qureshi serves as a consultant for Abbott, Centocor, Novartis, and the Centers for Disease Control and Prevention. He has also received a grant from Amgen/Pfizer to evaluate biomarkers in psoriasis and psoriatic arthritis.
Funding/Support: The work was partly supported by Department of Dermatology, Brigham and Women's Hospital, NHS II grant R01 CA50385.